Constraint on Hybrid Stars with Gravitational Wave Events

Kilar Zhang, Feng Li Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


Motivated by the recent discoveries of compact objects from LIGO/Virgo observations, we study the possibility of identifying some of these objects as compact stars made of dark matter called dark stars, or the mix of dark and nuclear matters called hybrid stars. In particular, in GW190814, a new compact object with 2.6 M is reported. This could be the lightest black hole, the heaviest neutron star, and a dark or hybrid star. In this work, we extend the discussion on the interpretations of the recent LIGO/Virgo events as hybrid stars made of various self-interacting dark matter (SIDM) in the isotropic limit. We pay particular attention to the saddle instability of the hybrid stars which will constrain the possible SIDM models.

Original languageEnglish
Article number231
Issue number12
Publication statusPublished - 2020 Dec


  • Dark matter
  • Gravitational wave
  • Hybrid star
  • Neutron star

ASJC Scopus subject areas

  • General Physics and Astronomy


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