Journal
UNIVERSE
Volume 6, Issue 12, Pages -Publisher
MDPI
DOI: 10.3390/universe6120231
Keywords
hybrid star; dark matter; neutron star; gravitational wave
Funding
- Taiwan Ministry of Science and Technology (MoST) [109-2112-M-003-007-MY3]
- MoST [107-2811-M-003-511]
- NCTS
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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-circle dot 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.
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