The spin of the second-born black hole in coalescing binary black holes

@article{Qin2018TheSO,
  title={The spin of the second-born black hole in coalescing binary black holes},
  author={Y. P. Qin and Tassos Fragos and Georges Meynet and Jeff J. Andrews and Mads S{\o}rensen and H. Francis Song},
  journal={Astronomy \& Astrophysics},
  year={2018}
}
Context. Various binary black hole formation channels have been proposed since the first gravitational event GW150914 was discovered by the Advanced Laser Interferometer Gravitational-Wave Observatory (AdLIGO). The immediate progenitor of the binary black hole is a close binary system composed of a black hole and a helium star, which can be the outcome of the classical isolated binary evolution through the common envelope, or alternatively of the massive close evolution through chemically… 
The origin of spin in binary black holes
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