BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Sarah Vigeland \, University of Wisconsin Milwaukee \n\n
Observat ions have shown that nearly all galaxies harbor massive or \;supermassive black holes at their centers. Gravitational wave (GW) observations \;of these black ho les will shed light on their growth and evolution\, and \;the merger histories of galaxies. Massive and supermassive black holes are also ideal \;laboratories f or studying strong-field gravity. Pulsar timing arrays (PTAs) are sensitiv e \;to GWs with frequencies ~1-100 nHz\, an d can detect GWs emitted by supermassive black hole \;binaries\, which form when two galaxies merge. The Laser Interf erometer Space Antenna (LISA) is a planned spac e-based GW detector that will be sensitive to GWs ~1-100 mHz\, and it will see a variety of sources\ , including merging massive black hole binaries and \; span>extreme mass-ratio inspires (EMRIs)\, whic h consist of a small compact object falling into a \; massive black hole. I will discuss source m odeling and detection techniques for LISA and PTAs\, \;< /span>as well as present limits on nanohertz GW s from the North American Nanohertz Observatory for \; span>Gravitational Waves (NANOGrav) collaborati on.< /span>
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\n DTSTART:20190123T203000Z LOCATION:Physics Building\, Room 204 SUMMARY:Probing Massive and Supermassive Black Holes with Gravitational Wav es END:VEVENT END:VCALENDAR