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DTSTART;TZID=America/Chicago:20240223T153000
DTEND;TZID=America/Chicago:20240223T170000
DTSTAMP:20260610T183114
CREATED:20240208T135341Z
LAST-MODIFIED:20240220T150248Z
UID:10435330-1708702200-1708707600@uwm.edu
SUMMARY:Physics Colloquium - Helvi Witek
DESCRIPTION:CSI Gravity: Investigating Mysteries of Fundamental Physics with Black Holes \nDr. Helvi Witek\, Asst. Professor\, Dept. of Physics\, UIUC\nBlack holes are among the most exciting predictions of Einstein’s theory of general relativity\, composed of the fabric of spacetime itself. Observations of black holes offer unique access to extreme gravity\, and they enable us to investigate long-standing puzzles in fundamental physics ranging from dark matter to the very nature of gravity itself. \nIn my presentation\, I will first provide an overview of recent black hole observations\, including gravitational wave detections. I will then discuss how we produce theoretical models of black hole mergers and gravitational waves using numerical relativity\, that are needed to correctly interpret the observations.  I will conclude with a taster on how we can use numerical relativity simulations to learn about the nature of gravity or new (axionlike) particles. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-helvi-witek/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240301T153000
DTEND;TZID=America/Chicago:20240301T163000
DTSTAMP:20260610T183114
CREATED:20240220T150216Z
LAST-MODIFIED:20240220T150216Z
UID:10435331-1709307000-1709310600@uwm.edu
SUMMARY:Physics Colloquium - Sarah Vigeland
DESCRIPTION:Searching for a Gravitational Wave Background with Pulsar Timing Arrays \nSarah Vigeland\, Asst. Professor\, Dept. of Physics\, UW-Milwaukee\nPulsar timing arrays use observations of millisecond pulsars to detect nanohertz gravitational waves.  The North American Nanohertz Observatory for Gravitational Waves (NANOGrav) Collaboration has recently released their 15-year data set containing observations of 68 millisecond pulsars.  These data contain evidence for Hellings-Downs correlations\, which are characteristic of a gravitational wave background.  \nIn this talk\, I will present these results\, and discuss the spectral properties of the signal and implications for the astrophysical source. I will also discuss prospects for detecting other types of gravitational wave sources with pulsar timing arrays\, including individual supermassive binary black holes. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-sarah-vigeland/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240308T153000
DTEND;TZID=America/Chicago:20240308T170000
DTSTAMP:20260610T183114
CREATED:20240226T180637Z
LAST-MODIFIED:20240228T194456Z
UID:10435332-1709911800-1709917200@uwm.edu
SUMMARY:Physics Colloquium - Alan Wiseman
DESCRIPTION:The Self-force on Static and Dynamic Charges in Schwarzschild Spacetime Using the Method of Images \nAlan Wiseman\, Assoc. Professor\, Dept. of Physics\, UW-Milwaukee\nOne of the most basic examples of a self-force phenomenon (sometimes called the radiation reaction force) is that of a small\, charged particle near a large spherical mass such as a Schwarzschild black hole.  If the particle is held stationary\, there are novel electrostatic forces on the particle. If the particle is orbiting the mass\, the fields created by the particle back-react on the particle and cause it to depart from its otherwise free-fall motion. There are many ways to solve for the forces and motion in these circumstances\, but past solutions have involved considerable technical machinery\, and the results are messy and “non-intuitive”.  \nI will take a fundamentally new approach to this problem using the method of image charges. This approach makes the origin of the forces easier to visualize.  In the talk\, I will make a clear analogy between this new work and that of familiar examples of the method of images in electrostatics. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-alan-wiseman/
LOCATION:Lapham 162\, 3209 N. Maryland Ave.\, Milwaukee\, 53211
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0757204;-87.8840564
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=Lapham 162 3209 N. Maryland Ave. Milwaukee 53211;X-APPLE-RADIUS=500;X-TITLE=3209 N. Maryland Ave.:geo:-87.8840564,43.0757204
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240329T153000
DTEND;TZID=America/Chicago:20240329T170000
DTSTAMP:20260610T183114
CREATED:20240311T212140Z
LAST-MODIFIED:20240311T212140Z
UID:10435337-1711726200-1711731600@uwm.edu
SUMMARY:Physics Colloquium - Gabor Csathy
DESCRIPTION:Professor Gabor Csathy\, Department of Physics and Astronomy\, Purdue University \nEmergent Particles and Topology in Flat Landau Bands \nElectronic systems with flat energy bands support a variety of topological phases of current interest.  The two-dimensional electron gas in the fractional quantum Hall regime is such a system.  Ground states of this system found an elegant description in terms of emergent particles called composite fermions.  \nIn this talk we review the topological ground states and some of their basic properties and discuss two recent discoveries: fractional quantum Hall states associated with flux-six composite fermions and a bubble phase of composite fermions. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-gabor-csathy/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240405T153000
DTEND;TZID=America/Chicago:20240405T170000
DTSTAMP:20260610T183114
CREATED:20240301T170802Z
LAST-MODIFIED:20240312T171812Z
UID:10435333-1712331000-1712336400@uwm.edu
SUMMARY:Physics Colloquium - Marcus Noack
DESCRIPTION:Dr. Marcus Noack\, Research Scientist\, Lawrence Berkeley National Lab \nNext-Generation Gaussian Processes for   Function Approximation\, Uncertainty Quantification\, and Decision-Making \nGaussian processes (GPs) and Gaussian-related stochastic processes are powerful tools for function approximation\, uncertainty quantification\, global optimization\, and autonomous data acquisition due to their robustness\, analytical tractability\, and natural inclusion of Bayesian uncertainty estimates. Even so\, Gaussian processes are often criticized for poor approximation performance and neck-breaking computational costs in real-life applications.  The reason for this gap\, however\, is not the methodology itself but rather a user-caused lack of flexibility and domain awareness of the underlying prior probability distribution.   \nIn this talk\, I address many challenges of GPs that might inhibit optimal performance.  We will discover hands-on solutions and tools that make implementation easy.  The key takeaway for the audience will be a better understanding of Gaussian processes and ways to customize them for optimal performance. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-marcus-noack/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240419T153000
DTEND;TZID=America/Chicago:20240419T170000
DTSTAMP:20260610T183114
CREATED:20240301T170912Z
LAST-MODIFIED:20240412T134014Z
UID:10435334-1713540600-1713546000@uwm.edu
SUMMARY:Physics Colloquium - Joel Nowitzke
DESCRIPTION:Joel Nowitzke\, PhD Candidate\, UW-Milwaukee \nModeling and Measurements of Network Formation and Viscoelastic Behavior of Folded Protein-Based Hydrogels \nProteins are vital for various daily functions and are even used in creating biocompatible materials through chemical crosslinking. However\, predicting the mechanical properties of these materials is challenging due to the random orientation of constituent molecules within the network. Bridging the gap between nanoscopic and macroscopic scales is essential for formulating predictable biomaterials. Through a combination of experimental methods and computational simulations\, including Single Molecule Magnetic Tweezers and Steered Molecular Dynamics Simulations\, we aim to understand these properties. This approach involves determining the relative stability of pulling geometries and simulating protein unfolding to create accurate models. By subjecting simulated networks to external stress\, we assess their behavior compared to experimental data\, ensuring realistic predictions. \nThe event flyer is available for download here.
URL:https://uwm.edu/physics/event/physics-colloquium-joel-nowitzke/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240426T153000
DTEND;TZID=America/Chicago:20240426T170000
DTSTAMP:20260610T183114
CREATED:20240301T171028Z
LAST-MODIFIED:20240426T125548Z
UID:10435335-1714145400-1714150800@uwm.edu
SUMMARY:Physics Colloquium - Rob Pisarski
DESCRIPTION:Rob Pisarski\, Distinguished Scientist\, Department of Physics\, Brookhaven National Laboratory \nThe Ugly Duckling and the Swan: The Quark-Gluon Plasma and Heavy Ion Collision \nI give a pedagogical and historical overview of the search for the Quark-Gluon plasma (QGP) in the collisions of heavy ions.  I begin with a brief review of why we expect a QGP to be formed at high temperature.  In this\, numerical simulations in lattice Quantum ChromoDynamics (QCD) form the bedrock of the field.  In particular\, they demonstrate the relationship between deconfinement and the restoration of chiral symmetry. \nAt the SPS at CERN\, I discuss the suppression of J/Psi mesons\, and the excess of dileptons below the rho meson.  Bjorken first noticed that a “plateau” may emerge at high energies\, and produce a regime at high temperature\, and low chemical potential.  At colliders such as RHIC\, at Brookhaven\, and the LHC\, at CERN\, I discuss two notable signals:  the utility of nearly ideal hydrodynamics\, and jet quenching.  The new frontier is going down to moderate collision energies\, which there is net excess of baryons.  Possible phenomena in this region include a critical end point and moat regimes. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-rob-pisarski/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20240503T153000
DTEND;TZID=America/Chicago:20240503T170000
DTSTAMP:20260610T183114
CREATED:20240301T171200Z
LAST-MODIFIED:20240423T152504Z
UID:10435336-1714750200-1714755600@uwm.edu
SUMMARY:Physics Colloquium - Segev BenZvi
DESCRIPTION:Segev BenZvi\, Assoc. Professor\, Department of Physics\, University of Rochester \nMeasuring Cosmic Expansion with the Dark Energy Spectroscopic Instrument \nSince the first observations of the accelerating expansion of the universe at the end of the 1990s\, astronomers and physicists have struggled to understand dark energy\, a mysterious repulsive force that drives the acceleration. A number of models of dark energy exist. The simplest (the cosmological constant)\, assumes dark energy is non-interacting and is the same everywhere in space and time. Different models predict subtely different features in the large-scale structure of the universe.   We are now entering an era of new photometric and spectroscopic surveys which can discriminate different models of dark energy with unprecedented precision.    \nIn this talk\, I will present the latest results from the Dark Energy Spectroscopic Instrument (DESI)\, a fiber-fed\, robotically-actuated galaxy redshift survey that has been in operation at Kitt Peak National Observatory since mid-2021.  In April 2024\, the DESI Collaboration released its results from the first year of data taking.   I will describe the performance of DESI\, summarize the first year of data and our cosmological analyses\, and present prospects for future results. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-segev-benzvi/
LOCATION:KIRC 1150\, 3135 N. Maryland Ave.\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC 1150 3135 N. Maryland Ave. Milwaukee WI 53211 United States;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241011T153000
DTEND;TZID=America/Chicago:20241011T170000
DTSTAMP:20260610T183114
CREATED:20241003T125926Z
LAST-MODIFIED:20241003T125926Z
UID:10435338-1728660600-1728666000@uwm.edu
SUMMARY:Physics Colloquium - Hongbin Li
DESCRIPTION:Hongbin Li\, Professor\, Department of Chemistry\, The University of British Columbia \nRational Engineering of Protein-based Biomaterials: from single molecule traits to functional material properties \nIn their biological settings\, elastomeric proteins function as molecular springs\, thereby establishing elastic connections\, plus providing mechanical strength and elasticity. With an ability to change their shape (evolving from simple\, random coil-like structures to a more sophisticated beads-on-a string formation)\, they fulfill their biological function. These complex protein polymers exhibit distinct mechanical properties. \nThe development of single molecule force spectroscopy techniques has made it possible to directly probe these properties\, at the single molecule level\, allowing us to understand their molecular design principles. This knowledge has enabled us to engineer novel elastomeric proteins to achieve tailored and well-defined nanomechanical properties. \nIn this talk\, specific examples will be given on engineering protein hydrogels to mimic the passive elastic properties of muscle\, as well as highly stiff and highly tough protein biomaterials to mimic the mechanical properties of cartilage. These studies will pave the way to utilizing proteins as building blocks to engineer new generations of protein-based biomaterials for diverse applications in biomedical engineering as well as material sciences. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-hongbin-li/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241018T153000
DTEND;TZID=America/Chicago:20241018T170000
DTSTAMP:20260610T183114
CREATED:20241007T125538Z
LAST-MODIFIED:20241007T125538Z
UID:10435339-1729265400-1729270800@uwm.edu
SUMMARY:Physics Colloquium - Catalin Picu
DESCRIPTION:Catalin Picu\, Dept. of Mechanical\, Aerospace & Nuclear Engineering\, Rensselaer Polytechnic Institute \nSoft Network Materials: Structure-Properties Relations \nMany materials have a stochastic network of filaments as their main structural component and are referred to collectively as ‘network materials.’ This class includes all biological connective tissue\, the extracellular matrix\, the intra-cellular cytoskeleton\, paper and cellulose-based products\, nonwovens\, as well as various molecular networks such as rubber\, gels and thermosets. \nThis talk reviews the relation between the structure of athermal networks and the material-scale mechanical properties\, focusing on identifying commonalities between these very diverse material systems. Properties of interest include the non-linear elastic response\, the viscoelastic response\, strength and toughness. The effect of inter-fiber adhesion on network mechanics will be also discussed. The talk provides a comprehensive overview of the mechanics of this broad class of materials. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-catalin-picu/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241122T153000
DTEND;TZID=America/Chicago:20241122T170000
DTSTAMP:20260610T183114
CREATED:20241119T202729Z
LAST-MODIFIED:20241119T202729Z
UID:10435340-1732289400-1732294800@uwm.edu
SUMMARY:Physics Colloquium - Dr. Joshua "Shua" Sanchez
DESCRIPTION:Dr. Joshua “Shua” Sanchez\, Postdoctoral Fellow\, Department of Physics\, MIT \nQuantum Criticality and Magnetic Field-Induced Superconductivity \nWhen electrons have strong interactions with each other\, new quantum phases of matter emerge\, such as magnetism\, nematicity\, charge order\, and superconductivity. In these “Quantum Materials”\, the microscopic interactions can be very difficult to probe and understand\, yet they give rise to macroscopic properties that are easier to study and can be harnessed for new technologies. \nIn this talk\, I will demonstrate how synchrotron x-ray techniques can be powerful probes to study the mysterious origin of strongly-correlated phases. I will discuss several recent projects at the Advanced Photon Source at Argonne National Laboratory\, using a novel sample characterization platform that simultaneously combines x-rays\, in-situ structural tuning\, applied magnetic field\, and electrical transport measurements. Our work yields new insights on two broad questions in high-temperature iron-based superconductors. (1) How does quantum criticality and nematicity relate to unconventional superconductivity? and (2) How can ferromagnetism and superconductivity coexist in one material\, and how do they affect each other? \nReferences:\n(1) Sanchez\, et al. Nature Materials 20\, 1519–1524 (2021)\n(2) Sanchez\, et al. Science Advances 9\, eadj5200 (2023) \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-dr-joshua-shua-sanchez/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241206T153000
DTEND;TZID=America/Chicago:20241206T170000
DTSTAMP:20260610T183114
CREATED:20241126T221025Z
LAST-MODIFIED:20241126T221025Z
UID:10435342-1733499000-1733504400@uwm.edu
SUMMARY:Physics Colloquium - Professor Scott A. Hughes
DESCRIPTION:Professor Scott A. Hughes\, Dept. of Physics & the Kavli Institute\, MIT  \nHigh-precision Waveforms with the Small-mass-ratio Limit \nCurrent gravitational-wave detectors are being upgraded\, and plans are developing for future detectors with greater sensitivity over broader frequency bands.  As instruments improve and develop\, more cycles of sources’ gravitational waveforms will be measured with greater signal to noise ratio.  Such higher fidelity measurements promise to teach us more about their sources and the nature of strong-field gravity — but only if theoretical modeling of these waves is able to match advances in the detectors.  As we measure waveforms with better precision\, the likelihood increases that systematic modeling errors will affect inferences about what we measure.   \nIn this talk\, I will survey recent progress modeling waveforms from small-mass binaries.  Such binaries\, which exactly describe important low-frequency gravitational wave sources\, also serve as a limit of the more general binary problem that can be modeled with very high precision.  I will discuss the outstanding progress that has been made on this problem in recent years\, and how what we learn in this limit can be combined with other binary modeling techniques to advance modeling for relativistic binaries in general. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-professor-scott-a-hughes/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20241213T153000
DTEND;TZID=America/Chicago:20241213T170000
DTSTAMP:20260610T183114
CREATED:20241126T135817Z
LAST-MODIFIED:20241126T212334Z
UID:10435341-1734103800-1734109200@uwm.edu
SUMMARY:Physics Colloquium - Scott Hertel
DESCRIPTION:Scott Hertel\, Assoc. Professor\, Dept. of Physics\, University of Massachusetts-Amherst  \nRecent Progress Towards the Detection of Dark Matter \nAs you read this\, you are immersed in a bath of particles beyond the Standard Model\, so-called ‘dark matter’ particles which are noticed only through their gravitational effects at astrophysical scales. Discovering the properties of these unseen particles (their mass\, interactions with other particles\, etc.) is one of the great challenges of 21st century physics. \nI will describe two complementary efforts which search for individual dark matter particles in a laboratory setting here on earth: LZ and TESSERACT. Each effort search Centeres for the individual scatters of galactic dark matter particles with atoms here on earth\, and each effort requires the development of novel and interesting technologies. I will update you on our progress towards unraveling this great mystery of physics. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-scott-hertel/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250221T153000
DTEND;TZID=America/Chicago:20250221T170000
DTSTAMP:20260610T183114
CREATED:20250206T135847Z
LAST-MODIFIED:20250218T185503Z
UID:10435343-1740151800-1740157200@uwm.edu
SUMMARY:Physics Colloquium - Geoffrey Bower
DESCRIPTION:Geoffrey Bower\, Chief Scientist for Hawaii Operations\, Academia Sinica Institute of Astronomy and Astrophysics\, Project Scientist\, Event Horizon Telescope Collaboration\, Affiliate Graduate Faculty\, University of Hawaii-Manoa\, Dept. of Physics and Astronomy \nImaging Black Holes with the Event Horizon Telescope \nThe Event Horizon Telescope (EHT) is a global submillimeter-wavelength very long baseline array that produces the highest angular resolution images of black holes. The EHT Collaboration has produced images of two black holes\, the supermassive black hole in the elliptical galaxy M87 and the Galactic Center black hole\, Sgr A*. \nIn this talk\, I will describe the techniques and technology behind these measurements\, give updates on the latest results\, and plans for future observations. Images of both sources have a ring-like morphology consistent with predictions of general relativity and the Kerr metric. Comparison with an unprecedented library of GRMHD simulations provides insights on the accretion and outflow properties. These results confirm that the gravitational lensing feature is a universal property of black holes\, establishes the consistency of general relativity over three orders of magnitude in mass\, and opens the door for future tests of gravitational physics\, accretion\, and jet formation. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-geoffrey-bower/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250228T153000
DTEND;TZID=America/Chicago:20250228T170000
DTSTAMP:20260610T183114
CREATED:20250225T151409Z
LAST-MODIFIED:20250227T162945Z
UID:10435344-1740756600-1740762000@uwm.edu
SUMMARY:Physics Colloquium - David Hogg
DESCRIPTION:David Hogg\, Professor of Physics & Data Science\, NYU \nSailing as Momentum Transport \nSailboats represent an ancient (but newly relevant) sustainable form of transportation. They work off the relative velocity between the air and the water. Sailboats can sail upwind (by tacking)\, they can sail downwind faster than the wind (also by tacking)\, and they can sail crosswind much faster than the wind. \nI present the simplest possible momentum transport model of a sailboat\, and explain all of these capabilities. In this (spherical scow) model\, the sailboat is defined by three dimensionless numbers: the sail-to-keel area ratio\, a lift ratio for the sail\, and a lift ratio for the keel. The model makes a number of amusing “predictions” that explain the properties of commercial and competitive sailboats. There are many connections to sustainable energy. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-david-hogg/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
X-TRIBE-STATUS:
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250314T153000
DTEND;TZID=America/Chicago:20250314T170000
DTSTAMP:20260610T183114
CREATED:20250312T161800Z
LAST-MODIFIED:20250312T161800Z
UID:10435345-1741966200-1741971600@uwm.edu
SUMMARY:Spring 2025 APS Preview Talks
DESCRIPTION:UWM Physics Post docs\, graduate student\, and faculty \nSpring 2025 APS Preview Talks \nMembers of the UWM Physics department will present their preview talks in preparation for the upcoming APS meetings \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/spring-2025-aps-preview-talks/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250404T153000
DTEND;TZID=America/Chicago:20250404T170000
DTSTAMP:20260610T183114
CREATED:20250401T144054Z
LAST-MODIFIED:20250401T144054Z
UID:10435346-1743780600-1743786000@uwm.edu
SUMMARY:Physics Colloquium - Shaswat Sardesai
DESCRIPTION:Shashwat Sardesai\, PhD Candidate\, UWM Physics \nCosmic Orchestra: The Gravitational Wave Background \nIn the last year and a half\, the North American Nanohertz Observatory for Gravitational Waves\, and their collaborators\, have detected the presence of a gravitational wave background using pulsar timing arrays. These gravitational waves likely arise from supermassive black hole binaries (SMBHBs) and have periods spanning years or decades. \nIn this talk\, I will go over the basics of PTAs\, the different methods to analyze the background\, as well as the projects I have worked on as a member of the NANOGrav collaboration to try and resolve aspects of the GWB. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-shaswat-sardesai/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250411T153000
DTEND;TZID=America/Chicago:20250411T170000
DTSTAMP:20260610T183114
CREATED:20250402T205328Z
LAST-MODIFIED:20250402T205328Z
UID:10435347-1744385400-1744390800@uwm.edu
SUMMARY:Physics Colloquium - Sheng Ran
DESCRIPTION:Sheng Ran\, Assistant Professor of Physics\, Washington University \nStrongly Correlation and Topology in Kondo Lattice Systems \nQuantum materials with both strong correlations and nontrivial band structure topology can have novel physics properties that do not exist in the non-correlated counterparts. Recent theoretical work has demonstrated that combination of Kondo physics and nonsymmorphic crystal symmetries can give rise to such strong correlated topological systems. \nIn this talk\, I will present our recent experimental exploration this direction. In one case\, we found intrinsic anomalous Hall effect that seems to break the Fermi liquid scaling relation. In another case\, we have discovered a candidate for topological Kondo insulator. \nThe event flyer is available here.
URL:https://uwm.edu/physics/event/physics-colloquium-sheng-ran/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250417T100000
DTEND;TZID=America/Chicago:20250417T120000
DTSTAMP:20260610T183114
CREATED:20250409T143045Z
LAST-MODIFIED:20250409T143116Z
UID:10435348-1744884000-1744891200@uwm.edu
SUMMARY:Physics Colloquium – Gabriel Freedman
DESCRIPTION:Speaker: Gabriel Freedman\, PhD Candidate – UWM Physics \nLow-frequency Gravitational Wave Searches and Data Analysis with Hamiltonian Sampling \nThe pulsar timing array community has found evidence for a correlated stochastic signal following the Hellings-Downs pattern indicative of an isotropic stochastic gravitational-wave background (GWB). The most likely source of such a background is a population of supermassive black hole binaries\, and particularly loud individual sources could be detected in future datasets. \nWe present work done towards performing joint Bayesian searches for both the GWB and single sources utilizing the Hamiltonian Monte Carlo sampling algorithm to efficiently explore these complex parameter spaces. We end by discussing applications of these methods to data analysis for the upcoming Laser Interferometer Space Antenna mission. \nLocation: Kenwood IRC 2175 \nTime: 10:00AM – 12:00PM \nDate: April 17th\, 2025
URL:https://uwm.edu/physics/event/physics-colloquium-gabriel-freedman/
LOCATION:KIRC KEN 2175\, 3135 N. Maryland Ave.\, Milwaukee\, 53211
CATEGORIES:Physics Colloquia
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GEO:43.0754962;-87.8839451
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=KIRC KEN 2175 3135 N. Maryland Ave. Milwaukee 53211;X-APPLE-RADIUS=500;X-TITLE=3135 N. Maryland Ave.:geo:-87.8839451,43.0754962
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250418T153000
DTEND;TZID=America/Chicago:20250418T170000
DTSTAMP:20260610T183114
CREATED:20250414T212700Z
LAST-MODIFIED:20250414T212728Z
UID:10435349-1744990200-1744995600@uwm.edu
SUMMARY:Physics Colloquium – Ned Budisa
DESCRIPTION:Speaker: Ned Budisa\, Professor & Research Chair\, Dept. of Chemistry\, University of Manitoba \nExpanding the Genetic Code via Directed Evolution: Tools for Biophysicists\, Materials Science\, and Beyond \nReprogramming the genetic code to include non-canonical amino acids (ncAAs) is a powerful tool in systems bioengineering that combines synthetic biology\, chemistry\, biophysics\, and genome manipulation. This approach enables enhanced protein biosynthesis\, deeper insights into translation\, and the creation of novel functionalities and new-to-nature proteins and other foldamer-scaffolds. Expansion of the genetic code results in proteins and cells with new properties\, including site-specific functionalization through various bioorthogonal chemistries. \nAt the heart of this endeavor are aminoacyl-tRNA synthetases (aaRS)\, whose modified forms – paired with cognate tRNAs – form orthogonal translation systems (OTS) for precise incorporation of ncAAs\, often via amber stop codons. Directed evolution under selective pressure is used to remodel the active aaRS center to accept specific ncAAs. Traditional gene libraries focus on the first-shell residues (<6 Å) and are constrained by the transformation limits of E. coli (~10⁸–10⁹ variants)\, often neglecting second-shell interactions (<9 Å). To overcome this\, computational enzyme design and novel wet-lab strategies are driving the evolution of effective binding pockets and cellular compatibility with exotic chemicals. \nI will illustrate these approaches using (i) directed evolution of enzyme pockets\, (ii) adaptive laboratory evolution of the amino acid repertoire\, and (iii) genomic integration of orthogonal translation machineries for synthetic cell design. \nFinally\, I will provide an overview of ncAAs that are valuable for biological spectroscopy and microscopy. These site-specifically incorporated ncAAs serve as vibrational\, fluorescent\, EPR\, or NMR probes in cellular\, organismic\, and in vitro contexts. Over the last two decades\, their use has provided unprecedented insights into protein structure and dynamics. Bioorthogonal reactions – in particular Click Chemistry – provide powerful tools to introduce labels or mimic post-translational modifications. Applications now include capturing transient interactions\, tuning protein function and generating therapeutic agents such as covalent peptides and site-specific labeled antibody conjugates. \nLocation: Chemistry 108\nTime: 3:30PM – 5:00PM\nDate: April 18th\, 202
URL:https://uwm.edu/physics/event/physics-colloquium-ned-budisa/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250502T153000
DTEND;TZID=America/Chicago:20250502T170000
DTSTAMP:20260610T183114
CREATED:20250429T165520Z
LAST-MODIFIED:20250429T165520Z
UID:10435350-1746199800-1746205200@uwm.edu
SUMMARY:Physics Colloquium - Sukanya Chakrabarti
DESCRIPTION:Speaker: Sukanya Chakrabarti\, Ph. D.\, Pei-Ling Chan Endowed Chair and Professor\, School of Physics and Astronomy\, University of Alabama-Huntsville \nThe Precision Frontier of Dark Matter Constraints from Direct Acceleration Measurements \nFor over a century\, our understanding of dark matter has hinged on kinematic estimates derived from static snapshots of stellar positions and velocities. However\, these methods are inaccurate for a time-dependent potential\, and there are now many lines of observational evidence that show that our Galaxy has had a highly dynamic history. We have now entered an era where we can carry out precision time-series measurements of the accelerations of stars that live within the gravitational potential of our Galaxy. \nI will discuss our comprehensive observational strategy to directly measure Galactic accelerations. Central to this discussion is our recent analysis of compiled pulsar timing data from which we were able to measure the Galactic acceleration for the first time\, and derive fundamental Galactic parameters. Discernible differences in sub-structure exist among popular dark matter models on small scales\, presenting testable nuances. I will discuss the potential for measuring dark matter sub-structure in the Milky Way by leveraging the diverse set of techniques we have developed\, including pulsar timing\, eclipse timing\, and extreme-precision radial velocity observations. I will review our results from our multi-pronged observing campaign\, and end by discussing synergies between Galactic dark matter constraints and constraints on theories of gravity. \nLocation: Chemistry 108 \nTime: 3:30PM – 5:00PM \nDate: May 2nd\, 2025 \n 
URL:https://uwm.edu/physics/event/physics-colloquium-sukanya-chakrabarti/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
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DTSTART;TZID=America/Chicago:20250509T153000
DTEND;TZID=America/Chicago:20250509T170000
DTSTAMP:20260610T183114
CREATED:20250506T205723Z
LAST-MODIFIED:20250506T205745Z
UID:10435351-1746804600-1746810000@uwm.edu
SUMMARY:Physics Colloquium - Katey Alatalo
DESCRIPTION:Speaker: Dr. Katey Alatalo\, Assistant Astronomer\, Space Telescope Science Institute \nThe Life-cycle of Gas in Dying Galaxies \nModern day galaxies populate a bimodal distribution\, in both morphology and color space. Their morphological and color properties are also inter-related\, with lenticular and elliptical galaxies exhibiting red colors and spiral galaxies usually exhibiting blue colors. In color space\, there is a genuine dearth of intermediate colored galaxies\, suggesting that the transition a galaxy undergoes to transform must be rapid\, and quenching galaxies\, rare. Gas – its presence\, absence\, and mechanics – serves as the anchor of a galaxy’s transformation from blue to red. \nI will discuss the nature of gas in transitioning and transitioned galaxies through two lenses: (1) How a galaxy transition is able to impact the behavior of molecular gas\, and (2) how new observations of molecular gas in quenching and quenched galaxies has recast our understanding of how they ultimately metamorphose from blue\, star-forming spirals into red\, quiescent ellipticals and lenticulars. \nLocation: Chemistry 108 \nTime: 3:30PM – 5:00PM \nDate: May 9th\, 2025
URL:https://uwm.edu/physics/event/physics-colloquium-katey-alatalo/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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DTSTART;TZID=America/Chicago:20250625T130000
DTEND;TZID=America/Chicago:20250625T143000
DTSTAMP:20260610T183114
CREATED:20250619T162939Z
LAST-MODIFIED:20250619T162939Z
UID:10435352-1750856400-1750861800@uwm.edu
SUMMARY:Physics Colloquium - Justin A. Trujillo
DESCRIPTION:Speaker: Justin A. Trujillo\, PhD Candidate – UWM Physics \nImplementing Novel Data Analysis Methods to Enhance Biophysical Studies \nStudying the structure\, motions\, and interactions of proteins as they perform their functions is greatly important in biophysics research. Time-resolved serial femtosecond crystallography (TRSFX) has been highly successful at resolving protein structures and motions. However\, TR-SFX data can be challenging to analyze. To address this\, we used a machine learning algorithm and applied it to simulated diffraction data for photoactive yellow protein (PYP). The results show that the machine learning method successfully recovers structural and dynamical information\, demonstrating that this method can be trusted for crystallography and other complex datasets. \nAnother method for studying proteins is fluorescence microscopy paired with Förster resonance energy transfer (FRET). Being highly sensitive to separation distance between fluorescent molecules\, FRET is a precise way to study protein interactions in cells. The quantity of interest in these studies is the FRET efficiency\, which measures energy transfer via FRET between fluorescent molecules. FRET efficiencies calculated from spectrally resolved data allow for the quaternary structure of proteins to be studied using a method known as FRET spectrometry. However\, due to constraints with interpreting data\, this capability has not been used with time-resolved data. In the second part of this work\, we show the results of implementing a novel method of extracting FRET efficiencies from time-resolved data. This new approach may expand FRET spectrometry to be compatible with time-resolved data. \nLocation: Kenwood IRC 2175 \nTime: 1:00PM – 2:30PM \nDate: June 25th\, 2025
URL:https://uwm.edu/physics/event/physics-colloquium-justin-a-trujillo/
LOCATION:Kenwood IRC 2175\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20250927T130000
DTEND;TZID=America/Chicago:20250927T150000
DTSTAMP:20260610T183114
CREATED:20250925T155317Z
LAST-MODIFIED:20250925T182858Z
UID:10435367-1758978000-1758985200@uwm.edu
SUMMARY:Coffeeshop Astrophysics - The View from Above
DESCRIPTION:The View from Above\nSpeakers: Leith Benali\, Lulu Agazie \nSince the launch of Sputnik 1 in 1957\, roughly 14\,500 satellites have been launched into orbit around Earth. Currently there are about 11\,700 active satellites\, roughly 1\,100 of which are used for Earth science. These are very powerful tools for studying large scale phenomena on Earth that are hard to observe from Earth’s surface. In this talk we’ll talk about how scientists use satellite observations for doing research on everything from weather patterns and tectonic plate movement to air pollution and environmental disasters. \nMore information is available on the Coffeeshop Astrophysics website.
URL:https://uwm.edu/physics/event/coffeeshop-astrophysics-the-view-from-above/
LOCATION:Anodyne Coffee Shop\, 224 W Bruce Street\, Milwaukee\, WI\, United States
CATEGORIES:Public Event
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251010T130000
DTEND;TZID=America/Chicago:20251010T140000
DTSTAMP:20260610T183114
CREATED:20250925T153653Z
LAST-MODIFIED:20251006T173953Z
UID:10435362-1760101200-1760104800@uwm.edu
SUMMARY:CGCA Seminar - Hector Silva
DESCRIPTION:Prof. Hector Silva\, Assistant Professor at the Department of Physics of the University of Illinois Urbana-Champaign\nThe ringing of a different bell: quasinormal modes and their excitation beyond general relativity \nThe inference of quasinormal mode frequencies from the ringdown part of gravitational-wave signals produced by the coalescence of black hole binaries can be used to infer the mass and spin of the remnant black hole and\, possibly\, test general relativity and extensions thereof in the strong-field regime. In this seminar\, I will share some findings of a long-term project aimed at studying the quasinormal-mode spectrum of black holes beyond general relativity\, and how these modes are excited given an initial perturbation. I will interpret these findings from an effective-field-theory perspective\, and discuss some (a priori!) surprising consequences. \nThe CGCA Friday Seminar Series is hosted by the Center for Gravitation\, Cosmology & Astrophysics at the University of Wisconsin-Milwaukee. These seminars cover a broad number of topics related to the Center’s research areas. Talk titles and abstracts will be posted when available.
URL:https://uwm.edu/physics/event/cgca-seminar-hector-silva/
LOCATION:Kenwood IRC 2175\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:CGCA Seminars
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251015T183000
DTEND;TZID=America/Chicago:20251015T200000
DTSTAMP:20260610T183114
CREATED:20250925T182443Z
LAST-MODIFIED:20250925T182443Z
UID:10435371-1760553000-1760558400@uwm.edu
SUMMARY:CGCA Public Talk - Searching for Life in the Universe
DESCRIPTION:Searching for Life in the Universe\nPresented by Dr. Dawn Erb \nWe hope you will join us on Wednesday\, October 15 in the new Chemistry Building\, Room #108 for Dr. Dawn Erb’s presentation\, “Searching for Life in the Universe.” \nThis is a free event! Doors open at 6:30 pm with cookies and dessert bars as well as a cash bar. The program will start at 7:00 pm.  \nPlease reserve your free spot for this event. More information is available on the CGCA website. \nDue to construction\, we recommend you use the parking garage under the Lubar College of Business\, located at 3202 N. Maryland Ave. This is a full pay garage that offers ADA parking options near the entrance. You will pull a ticket to enter and pay upon exit. You will find the Chemistry Building by walking south on Maryland to the crosswalk. Head west using the crosswalk on the corner of Maryland Ave. and Kenwood Blvd. The new Chemistry Building is just a half a block\, with entrances on Kenwood Blvd. Please be sure to note the restrictions on parking signs if you choose to park on the street. \nADA parking spaces are also available in the front of the Chemistry Building. You will need to pay for parking through the MKE Park Mobile app by using code 59043 which will allow extending the parking session past the 30 minutes limit on the Chemistry circle signs. The hourly rate is $0.80/hour. \nLastly\, if you don’t wish to use a parking app\, you can call UWM Transportation Services at 414-229-4000 on the day of and pay for parking over the phone. They will collect payment via a credit/debit card. They will ask for your license plate information and email if you would like a receipt. The office is open until 4:30 pm weekdays. \nWe look forward to seeing you there!
URL:https://uwm.edu/physics/event/cgca-public-talk-searching-for-life-in-the-universe/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Leonard E Parker Center,Public Event
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251017T130000
DTEND;TZID=America/Chicago:20251017T140000
DTSTAMP:20260610T183114
CREATED:20250925T154334Z
LAST-MODIFIED:20251013T181702Z
UID:10435363-1760706000-1760709600@uwm.edu
SUMMARY:CGCA Seminar - Usha Raut
DESCRIPTION:Prof. Usha Raut\, Milwaukee School of Engineering\nCan LIGO be Relevant for High Energy Physics? \nThere have been spectacular advances by LIGO\, and other gravitational wave detectors in recent years. But an obvious limitation is that gravitational wave detectors currently in operation mostly deal with frequencies below 10 kHz. At the same time\, it is generally accepted that there could be very promising physics still to be discovered at higher frequency scales of the gravitational wave spectrum. This can be understood better when we consider the vast frequency ranges that have been discovered for the electromagnetic spectrum and the incredibly useful applications that have been found for high frequency x-rays and gamma rays. \nTherefore\, a major goal of this presentation is to get a dialogue started on the possibility of a LIGO expansion to high and ultra-high frequencies of the gravitational wave spectrum within a laboratory setting\, without necessarily relying on astrophysical or cosmological sources. \nThe CGCA Friday Seminar Series is hosted by the Center for Gravitation\, Cosmology & Astrophysics at the University of Wisconsin-Milwaukee. These seminars cover a broad number of topics related to the Center’s research areas. Talk titles and abstracts will be posted when available.
URL:https://uwm.edu/physics/event/cgca-seminar-usha-raut/
LOCATION:Kenwood IRC 2175\, Milwaukee\, WI\, 53211\, United States
CATEGORIES:CGCA Seminars
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251024T153000
DTEND;TZID=America/Chicago:20251024T170000
DTSTAMP:20260610T183114
CREATED:20251002T142122Z
LAST-MODIFIED:20251020T211711Z
UID:10435372-1761319800-1761325200@uwm.edu
SUMMARY:Physics Colloquium - Amanda Baylor
DESCRIPTION:Early Warning of Gravitational Waves from Neutron Star Mergers\nAmanda Baylor\nGraduate Student\nUniversity of Wisconsin-Milwaukee \nFor the past decade\, ground-based gravitational-wave observatories have been making detections of ripples in the fabric of spacetime from the mergers of black holes and neutron stars. Mergers involving at least one neutron star could also produce electromagnetic counterparts which may reveal new insights into the physics of these astrophysical phenomena.  However\, if electromagnetic observatories are not pointed at the location of the source prior to merger\, we miss vital information about the physics of merger.  This presents a need for early-warning alerts\, which are alerts that are sent to observatories once a gravitational wave has been detected but before the objects collide and merge.  \nThis talk will provide an overview of gravitational-wave physics from detection to data analysis and discuss the prospects for early-warning detection of neutron star mergers.
URL:https://uwm.edu/physics/event/physics-colloquium-amanda-baylor/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251025T130000
DTEND;TZID=America/Chicago:20251025T150000
DTSTAMP:20260610T183114
CREATED:20250925T155542Z
LAST-MODIFIED:20250925T182841Z
UID:10435368-1761397200-1761404400@uwm.edu
SUMMARY:Coffeeshop Astrophysics - Nebulae: From Cradle to Grave\, and Cradle Again
DESCRIPTION:Nebulae: From Cradle to Grave\, and Cradle Again\nSpeakers: Calvin Dear\, Jason Vazquez\, Caleb Ogle \nHave you ever looked at a stunning picture from NASA full of swirling colors\, almost like it should be hanging in an art museum? Chances are\, you’re looking at a nebula. Nebulae are enormous clouds of dust and gas out in space. Some nebulae are the aftermath of a supernova\, the explosive death of a massive star. Others serve as the birthplace of many new stars\, formed by the gravitational pull of gas and radiative push of their first stars. Some nebulae even act as both. Join us as we explore nebulae and their role in star formation\, and of course\, look at many breathtaking pictures. \nMore information is available on the Coffeeshop Astrophysics website.
URL:https://uwm.edu/physics/event/coffeeshop-astrophysics-nebulae-from-cradle-to-grave-and-cradle-again/
LOCATION:Anodyne Coffee Shop\, 224 W Bruce Street\, Milwaukee\, WI\, United States
CATEGORIES:Public Event
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BEGIN:VEVENT
DTSTART;TZID=America/Chicago:20251031T153000
DTEND;TZID=America/Chicago:20251031T170000
DTSTAMP:20260610T183114
CREATED:20251002T142223Z
LAST-MODIFIED:20251020T211455Z
UID:10435373-1761924600-1761930000@uwm.edu
SUMMARY:Physics Colloquium - Pratyusava Baral
DESCRIPTION:Detecting & Measuring Gravitational Waves in Current and Future Observatories\nPratyusava Baral\nGraduate Student\nUniversity of Wisconsin-Milwaukee \nLow-latency (near real-time) detection of gravitational waves (GW) is crucial for multimessenger astronomy. I contribute to maintaining and operating the GstLAL-based search pipeline\, a flagship detection pipeline used by the LIGO-Virgo-KAGRA collaboration\, for the present observing run (May 2023 – ongoing). To test low-latency performance\, mock data challenges (MDC) are designed. I studied the latencies of sending out public alerts\, used to communicate with astronomers\, after a detection using the MDC. I also demonstrated the feasibility of a neural network-based algorithm that identifies the event with the best skymap for multimessenger follow-up from a set of several GW triggers in low latency. \nLooking forward to next-generation detectors such as Cosmic Explorer (CE)\, I developed the first Bayesian framework to estimate errors on inferred parameters\, incorporating effects due to Earth’s rotation and the long arm-lengths of the detectors. These effects are important for next-generation detectors and can be used to localize sources on the sky. This framework can analyze long and loud signals in ~1 day and is capable of using waveforms containing higher modes of radiation.
URL:https://uwm.edu/physics/event/physics-colloquium-pratyusava-baral/
LOCATION:Chemistry 108\, 2050 E Kenwood Blvd\, Milwaukee\, WI\, 53201\, United States
CATEGORIES:Physics Colloquia
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