BEGIN:VCALENDAR VERSION:2.0 PRODID:Data::ICal 0.22 BEGIN:VEVENT DESCRIPTION:Ilias Cholis\, Johns Hopkins University\n\n
The nature of dar k matter is one of the most longstanding and puzzling questions in physics . With cosmological measurements we have been able to measure its abundanc e with great precision. Yet\, what dark matter is composed of remains a my stery.
\n\nIn 2016 the first ever observation of gravitational waves from the coalescence event of two black holes was achieved by the LIGO in terferometers.
\n\nTogether with my collaborators we recently advoca ted that the interactions of 30 solar masses primordial black holes compos ing the dark matter could explain this event.
\n\nThis opens up a ne w window in indirect searches for dark matter.
\n\nIn my talk\, I wi ll discuss the various probes to distinguish between these mergers of prim ordial black holes\, from the more traditional astrophysical black hole bi naries.
\n\nOne is through their mass spectrum\, another is through cross-correlation of gravitational events with future overlapping galaxy c atalogs. A third\, is through their contribution to the stochastic gravita tional wave background. Finally a fourth probe uses the fact that primordi al black black holes form binaries with highly eccentric orbits. Those wil l then merge on timescales that in some cases are years\, days or even min utes\, retaining some eccentricity in the last seconds before the merger\, which can be detected by LIGO and future ground based interferometers.
\n DTSTART:20170118T203000Z LOCATION:Physics Building\, Room 204 SUMMARY:Searching for Dark Matter in Gravitational Waves END:VEVENT END:VCALENDAR