A spectroscopic campaign targeting low-metallicity stars with high Gaia astrometric noise yields one strong dormant black hole candidate and a simulation-based claim that the search strategy recovers at least half of such binaries within its selection.
The formation of black-holes in low-mass X-ray binaries
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abstract
We calculate the formation rates of low-mass X-ray binaries with a black hole. Both a semi-analytic and a more detailed model predict formation rates two orders of magnitude lower than derived from the observations. Solution of this conundrum requires either that stars with masses less than 20M$_\odot$ can evolve into a black hole, or that stellar wind from a member of a binary is accompanied by a much larger loss of angular momentum than hitherto assumed.
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A Spectroscopic Search for Dormant Black Holes in Low-Metallicity Binaries
A spectroscopic campaign targeting low-metallicity stars with high Gaia astrometric noise yields one strong dormant black hole candidate and a simulation-based claim that the search strategy recovers at least half of such binaries within its selection.