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SUMMARY:Dark and shiny dresses around black holes
DTSTART;VALUE=DATE-TIME:20200512T100000Z
DTEND;VALUE=DATE-TIME:20200512T110000Z
DTSTAMP;VALUE=DATE-TIME:20260610T140840Z
UID:indico-event-4121@indico.ific.uv.es
DESCRIPTION:The discovery of gravitational wave signals from merger events
  of massive binary-black-hole (BBH) systems have prompted a renewed debat
 e in the scientific community about the existence of primordial black hole
 s (PBHs) of O(1-100) solar masses. These objects may have formed in the ea
 rly Universe and could constitute a significant portion of the elusive da
 rk matter that\, according to standard cosmology\, makes up the majority o
 f the matter content in the universe. I will review the most recent devel
 opments of this field\, with focus on multi-messenger prospects of detecti
 on. In the first part of the talk\, I will present the prospects of disco
 very for both a hypothetical PBH population and the guaranteed population 
 of astrophysical isolated black holes in our Galaxy\, based on the radio a
 nd X-ray emission from the interstellar gas that is being accreted onto th
 em (the “shiny dresses”). A future detection will be possible thanks t
 o the expected performance of forthcoming radio facilities such as SKA and
  ngVLA.  Then\, I will turn my attention to scenarios where primordial bl
 ack holes constitute a sub-dominant component of the dark matter\, and stu
 dy the impact of dark matter mini-spikes that are expected to form around 
 them (the “dark dresses”) on several observables. In this context\, I 
 will first present an updated computation of the PBH merger rate as a fu
 nction of DM fraction and redshift that takes into account the impact of t
 he dark dresses. Then\, I will discuss the observational prospects of thes
 e dresses in binary systems composed of a stellar-mass and an intermediate
 -mass black hole: I will show a novel calculation of the dephasing of the
  gravitational waveform induced by the DM spike\, potentially detectable 
 with the LISA space interferometer.\n\nhttps://indico.ific.uv.es/event/412
 1/
LOCATION:online Online
URL:https://indico.ific.uv.es/event/4121/
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