{"195711":{"#nid":"195711","#data":{"type":"event","title":"Electromagnetic Emission from Supermassive Black Hole Mergers","body":[{"value":"\u003Ch5\u003ESchool of Physics Center for Relativistic Astrophysics Seminar:\u0026nbsp; Presenting Zoltan Haiman, Columbia University\u003C\/h5\u003E\u003Cp\u003EI will review ideas that may be useful in identifying electromagnetic (EM) emission from supermassive black hole (SMBH) binaries. In particular, any detectable EM emission is likely to be time-variable, which should aid in its identification. I will discuss four possibilities for such variable emission: (i) roughly periodic signals due to the orbital motion prior to coalescence, (ii) a transient pre-cursor caused by the gas trapped inside the binary\u0027s orbit, and transients \u0022after-glows\u0022 produced by (iii) post-merger gas accretion and (iv) by merger-induced shocks in a circumbinary disk. I will argue that these time-variable EM signatures may be used to identify unique counterparts of gravitational wave sources expected to be detected by (e)LISA and by Pulsar Timing Arrays. I will also highlight the extra science that will be enabled if an EM counterpart is found, such as constraints on SMBH accretion physics, cosmology, and gravitational physics.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"Electromagnetic Emission from Supermassive Black Hole Mergers"}],"uid":"27664","created_gmt":"2013-02-27 11:41:28","changed_gmt":"2016-10-08 02:02:46","author":"Alison Morain","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2013-03-07T14:00:00-05:00","event_time_end":"2013-03-07T15:00:00-05:00","event_time_end_last":"2013-03-07T15:00:00-05:00","gmt_time_start":"2013-03-07 19:00:00","gmt_time_end":"2013-03-07 20:00:00","gmt_time_end_last":"2013-03-07 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"126011","name":"School of Physics"}],"categories":[],"keywords":[{"id":"59891","name":"Electromagnetic Emission from Supermassive Black Hole Mergers"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cp\u003E\u003Ca href=\u0022mailto:alison.morain@physics.gatech.edu\u0022\u003Ealison.morain@physics.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}