Constraint on Hybrid Stars with Gravitational Wave Events

Universe

Feng-Li Lin¹  Kilar Zhang¹ 

[1] Department of Physics, National Taiwan Normal University, Taipei 11677, Taiwan;

关键词: hybrid star;    dark matter;    neutron star;    gravitational wave;   

DOI  :  10.3390/universe6120231

来源: DOAJ

【 摘 要 】

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 $M_{\odot }$ 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.

【 授权许可】

Unknown