Could the GW190814 Secondary Component Be a Bosonic Dark Matter Admixed Compact Star?

  title={Could the GW190814 Secondary Component Be a Bosonic Dark Matter Admixed Compact Star?},
  author={Billy K. K. Lee and Ming-chung Chu and Lap Ming Lin},
  journal={The Astrophysical Journal},
We investigate whether the recently observed 2.6 M ⊙ compact object in the gravitational wave event GW190814 can be a bosonic dark matter (DM) admixed compact star. By considering the three constraints of mass, radius, and the stability of such an object, we find that if the DM is made of QCD axions, their particle mass m is constrained to a range that has already been ruled out by the independent constraint imposed by the stellar-mass black hole superradiance process. The 2.6 M ⊙ object can… 
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