{"id":1922,"date":"2014-11-04T16:56:11","date_gmt":"2014-11-04T22:56:11","guid":{"rendered":"https:\/\/uwm.edu\/physics\/?post_type=tribe_events&#038;p=1922"},"modified":"2023-02-07T09:51:15","modified_gmt":"2023-02-07T15:51:15","slug":"cgca-seminar-sam-gralla","status":"publish","type":"tribe_events","link":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/","title":{"rendered":"CGCA Seminar: Sam Gralla"},"content":{"rendered":"<p><strong>Sam Gralla<\/strong>, University of Arizona<br \/>\n<strong>Spacetime Physics of Force Free Magnetospheres<\/strong><br \/>\nPhysics \u2013 Room 481<\/p>\n<p>The spectacular displays of pulsars and quasars are likely energized by rotating compact objects (neutron stars and black holes, respectively) through their plasma magnetospheres. When the magnetic field energy dominates that of the plasma, the system can be described by force-free electrodynamics (FFE), a non-linear, autonomous set of equations for the electromagnetic field on the compact object spacetime. Despite its simple covariant formulation, FFE has primarily been studied in 3+1 frameworks, where spacetime is split into space and time in an arbitrary way. I will describe new results, techniques and insights from an emerging research program taking a spacetime-geometrical approach to the physics of force-free magnetospheres.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sam Gralla, University of Arizona Spacetime Physics of Force Free Magnetospheres Physics \u2013 Room 481 The spectacular displays of pulsars and quasars are likely energized by rotating compact objects (neutron stars and black holes, respectively) through their plasma magnetospheres. When &hellip;<\/p>\n","protected":false},"author":28,"featured_media":0,"template":"","meta":{"_acf_changed":false,"_tribe_events_status":"","_tribe_events_status_reason":"","_tribe_events_is_hybrid":"","_tribe_events_is_virtual":"","_tribe_events_virtual_video_source":"","_tribe_events_virtual_embed_video":"","_tribe_events_virtual_linked_button_text":"","_tribe_events_virtual_linked_button":"","_tribe_events_virtual_show_embed_at":"","_tribe_events_virtual_show_embed_to":[],"_tribe_events_virtual_show_on_event":"","_tribe_events_virtual_show_on_views":"","_tribe_events_virtual_url":"","footnotes":"","uwm_wg_additional_authors":[]},"tags":[],"tribe_events_cat":[46],"class_list":["post-1922","tribe_events","type-tribe_events","status-publish","hentry","tribe_events_cat-cgca-seminars","cat_cgca-seminars"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.3 (Yoast SEO v27.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Physics &amp; Astronomy<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CGCA Seminar: Sam Gralla\" \/>\n<meta property=\"og:description\" content=\"Sam Gralla, University of Arizona Spacetime Physics of Force Free Magnetospheres Physics \u2013 Room 481 The spectacular displays of pulsars and quasars are likely energized by rotating compact objects (neutron stars and black holes, respectively) through their plasma magnetospheres. When &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/\" \/>\n<meta property=\"og:site_name\" content=\"Physics &amp; Astronomy\" \/>\n<meta property=\"article:modified_time\" content=\"2023-02-07T15:51:15+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/event\\\/cgca-seminar-sam-gralla\\\/\",\"url\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/event\\\/cgca-seminar-sam-gralla\\\/\",\"name\":\"CGCA Seminar: Sam Gralla - Physics &amp; Astronomy\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/#website\"},\"datePublished\":\"2014-11-04T22:56:11+00:00\",\"dateModified\":\"2023-02-07T15:51:15+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/event\\\/cgca-seminar-sam-gralla\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/uwm.edu\\\/physics\\\/event\\\/cgca-seminar-sam-gralla\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/event\\\/cgca-seminar-sam-gralla\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Events\",\"item\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/events\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"CGCA Seminar: Sam Gralla\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/#website\",\"url\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/\",\"name\":\"Physics &amp; Astronomy\",\"description\":\"UW-Milwaukee\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/uwm.edu\\\/physics\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Physics &amp; Astronomy","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/","og_locale":"en_US","og_type":"article","og_title":"CGCA Seminar: Sam Gralla","og_description":"Sam Gralla, University of Arizona Spacetime Physics of Force Free Magnetospheres Physics \u2013 Room 481 The spectacular displays of pulsars and quasars are likely energized by rotating compact objects (neutron stars and black holes, respectively) through their plasma magnetospheres. When &hellip;","og_url":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/","og_site_name":"Physics &amp; Astronomy","article_modified_time":"2023-02-07T15:51:15+00:00","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/","url":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/","name":"CGCA Seminar: Sam Gralla - Physics &amp; Astronomy","isPartOf":{"@id":"https:\/\/uwm.edu\/physics\/#website"},"datePublished":"2014-11-04T22:56:11+00:00","dateModified":"2023-02-07T15:51:15+00:00","breadcrumb":{"@id":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/uwm.edu\/physics\/event\/cgca-seminar-sam-gralla\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/uwm.edu\/physics\/"},{"@type":"ListItem","position":2,"name":"Events","item":"https:\/\/uwm.edu\/physics\/events\/"},{"@type":"ListItem","position":3,"name":"CGCA Seminar: Sam Gralla"}]},{"@type":"WebSite","@id":"https:\/\/uwm.edu\/physics\/#website","url":"https:\/\/uwm.edu\/physics\/","name":"Physics &amp; Astronomy","description":"UW-Milwaukee","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/uwm.edu\/physics\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"acf":[],"publishpress_future_workflow_manual_trigger":{"enabledWorkflows":[]},"_links":{"self":[{"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tribe_events\/1922","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tribe_events"}],"about":[{"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/types\/tribe_events"}],"author":[{"embeddable":true,"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/users\/28"}],"version-history":[{"count":2,"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tribe_events\/1922\/revisions"}],"predecessor-version":[{"id":5115,"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tribe_events\/1922\/revisions\/5115"}],"wp:attachment":[{"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/media?parent=1922"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tags?post=1922"},{"taxonomy":"tribe_events_cat","embeddable":true,"href":"https:\/\/uwm.edu\/physics\/wp-json\/wp\/v2\/tribe_events_cat?post=1922"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}