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arXiv · 2004.11821

Galactic population of black holes in detached binaries with low-mass stripped helium stars: the case of LB-1 (LS~V+22~25)

L. R. Yungelson·A. G. Kuranov·K. A. Postnov·D. A. Kolesnikov
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Abstract

We model the Galactic population of detached binaries that harbor black holes with (0.5-1.7) solar mass companions -- the remnants of case B mass-exchange that rapidly cross Hertzsprung gap after the termination of the Roche-lobe overflow or as He-shell burning stars. Several such binaries can be currently present in the Galaxy. The range of black hole masses in them is about 4 to 10 solar ones, the orbital periods are tens to hundreds day. The unique BH-binary LB-1 fits well into this extremely rare class of double stars.

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L. R. Yungelson, A. G. Kuranov, K. A. Postnov, D. A. Kolesnikov. 2020-04-24. Galactic population of black holes in detached binaries with low-mass stripped helium stars: the case of LB-1 (LS~V+22~25). https://doi.org/10.1093/mnrasl%2Fslaa076

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