Bosonic dark matter in neutron stars and its effect on gravitational wave signal

Sep 8, 2021
18 pages
Published in:
  • Phys.Rev.D 105 (2022) 2, 023001
  • Published: Jan 3, 2022
e-Print:
DOI:

Citations per year

2012201520182021202401020304050
Abstract: (APS)
We study an impact of self-interacting bosonic dark matter (DM) on various observable properties of neutron stars (NSs). The analysis is performed for asymmetric DM with masses from few MeV to GeV, the self-coupling constant of order O(1) and various DM fractions. Allowing a mixture between DM and baryonic matter, the formation of a dense DM core or an extended dark halo has been explored. We find that both distribution regimes crucially depend on the mass and fraction of DM for sub-GeV boson masses in the strong coupling regime. From the combined analysis of the mass-radius relation and the tidal deformability of compact stars including bosonic DM, we set a stringent constraint on DM fraction. We conclude that observations of 2M NSs together with Λ1.4580 constraint, set by LIGO/Virgo Collaboration, favor sub-GeV DM particles with low fractions below 5%.
Note:
  • 18 pages, 17 figures, matches the published version in PRD
  • boson: dark matter
  • boson: mass
  • dark matter: asymmetry
  • star: compact
  • neutron star
  • GeV
  • gravitational radiation
  • LIGO
  • VIRGO
  • formation