Dark Matter-Induced Low-Mass Gap Black Hole Echoing LVK Observations

Apr 7, 2024
8 pages
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Abstract: (arXiv)
The recent detection of gravitational waves from a binary merger involving a potential low-mass gap black hole (LMBH) by LIGO-Virgo-KAGRA (LVK) Collaboration motivates investigations into mechanisms beyond conventional stellar evolution theories to account for their existence. We study a mechanism in which dark matter (DM), through its capture and accumulation inside main sequence stars, induces the formation of black holes within the mass range of [3,5]M[3, 5]M_\odot. We examine the distribution of these LMBHs as a function of galaxy halo mass, particularly when paired with neutron stars. This gives a distinct signature that can be tested with future gravitational wave observations. We find that a viable portion of the DM parameter space predicts a merger rate of such binaries consistent with LVK observations.
Note:
  • 8 pages for main text, 7 pages for method, 3 figures
  • galaxy: halo
  • black hole: formation
  • halo: mass
  • dark matter: parameter space
  • binary
  • gravitational radiation
  • gap
  • capture
  • star
  • neutron star