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SUMMARY:Probing the Dark Universe with Gravitational Waves
DTSTART:20180423T140000
DTEND:20180423T153000
DTSTAMP:20260511T105528Z
UID:4de8da95b8abbdd388207718077b529e3993c0df45fda66fdf2202f7
CATEGORIES:Conferences - Seminars
DESCRIPTION:Jose Maria Ezquiaga Bravo (IFT Madrid)\nGravitational wave (GW
 ) astronomy has come to revolutionize our understanding of astrophysics\, 
 cosmology and fundamental physics. GWs from binary black-hole (BH) mergers
  allow us to learn about the population of BHs\, their origin and their ro
 le through the history of the universe. If these BHs are produced abundant
  enough at early times\, they could comprise a large fraction of the Dark 
 Matter (DM). As a case of study\, I will present how a copious production 
 of primordial BHs can arise in Critical Higgs Inflation and discuss its GW
 s signatures.\nMoreover\, GWs detected with an associated counterpart can 
 probe the expansion of the universe and Dark Energy (DE). The recent measu
 rement of the GW speed following GW170817 is an excellent example of the i
 mmense potential available to GWs tests of gravity. I will present the con
 ditions for anomalous GW speed and classify the theories for DE that remai
 n viable after GW170817. Finally\, I will discuss how other propagation ef
 fects could also shed light on the quest for the nature of DE.
LOCATION:BSP 727 https://plan.epfl.ch/?room==BSP%20727
STATUS:CONFIRMED
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