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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-6463
DTSTART:20210629T190000Z
DTEND:20210629T200000Z
DTSTAMP:20260414T220319Z
LAST-MODIFIED:20210625T160150Z
LOCATION:https://berkeley.zoom.us/j/91922781599
SUMMARY:Mergers as a Probe of Particle Dark Matter\, Network in Neutri
 nos\, Nuclear Astrophysics\, and Symmetries (N3AS) Seminar\, Anupam Ra
 y\, Tata Institute Of Fundamental Research\, India
DESCRIPTION:Unusual masses of the black holes being discovered by grav
 itational wave experiments pose fundamental questions about the origin
  of these black holes. More interestingly\, black holes with masses sm
 aller than the Chandrasekhar limit (~1.4 solar mass) are essentially i
 mpossible to produce through any standard stellar evolution. Black hol
 es of primordial origin\, with fine-tuned parameters and with no well-
 established formation mechanisms\, are the most discussed explanation 
 of these objects. In this talk\, I will discuss a simple and elegant p
 roduction channel of sub-Chandrasekhar mass non-primordial black holes
 . Particle dark matter with no antiparticle counterpart\, owing to the
 ir interaction with stellar nuclei\, can catastrophically accumulate i
 nside compact stars and eventually transmute them to sub-Chandrasekhar
  mass black holes. Our recent work points out several avenues to test 
 the transmuted origin of low mass black holes\, and demonstrates that 
 binary merger rates at high redshift are distinctively different for p
 rimordial and transmuted black holes. Measurement of these binary merg
 er rates by the imminent gravitational wave detectors can conclusively
  determine the origin of low mass black holes.
URL:https://www.physics.wisc.edu/events/?id=6463
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