On the origin of GW190425

  title={On the origin of GW190425},
  author={Isobel M. Romero-Shaw and Nicholas Farrow and Simon Stevenson and Eric Thrane and Xing-Jiang Zhu},
  journal={Monthly Notices of the Royal Astronomical Society},
The LIGO/Virgo collaborations recently announced the detection of a likely binary neutron star merger, GW190425. The total mass of GW190425 is significantly larger than the masses of Galactic double neutron stars known through radio astronomy. This suggests that GW190425 formed differently from Galactic double neutron stars. We hypothesize that GW190425 formed via unstable "case BB" mass transfer. According to this hypothesis, the progenitor of GW190425 was a binary consisting of a neutron star… 

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