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SUMMARY:Primordial Black Holes - Positivist Perspective and Quantum Quiddi
 ty - Florian Kühnel (LMU Munich)
DTSTART:20250127T130000Z
DTEND:20250127T140000Z
UID:TALK224476@talks.cam.ac.uk
CONTACT:Thomas Colas
DESCRIPTION:Primordial black holes are black holes that may have formed in
  the early Universe. Their masses potentially span a range from as low as 
 the Planck mass up to many orders of magnitude above the solar mass. This\
 , in particular\, includes those black holes recently discovered by LIGO/V
 irgo/KAGRA\, and (part of) these may conceivably be of primordial origin. 
 After a general introduction on primordial black holes\, I review the obse
 rvational hints for their existence -- from a variety of lensing\, dynamic
 al\, accretion and gravitational-wave effects. As I will show\, all of the
 se (over 20) may be explained by a single and simple unified model\, natur
 ally shaped by the thermal history of the Universe. If time permits\, I wi
 ll comment on vorticity\, which we recently conjectured to be a novel feat
 ure of (near-extremally rotating) black holes\, this possibly yielding the
  very first astrophysical observable for quantum effects in these compact 
 bodies.
LOCATION:CMS\, Pav. B\, CTC Common Room (B1.19) [Potter Room]
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