Light curve for VFTS 243

Stellar-mass black holes are the final remnants of stars born with more than 15 solar masses. Billions are expected to reside in the Local Group, yet only a few are known, mostly detected through X-rays emitted as they accrete material from a companion star. Here, we report on VFTS 243: a massive X-ray-faint binary in the Large Magellanic Cloud. With an orbital period of 10.4d, it comprises an O-type star of 25 solar masses and an unseen companion of at least nine solar masses. Our spectral analysis excludes a non-degenerate companion at a 5{sigma} confidence level. The minimum companion mass implies that it is a black hole. No other X-ray-quiet black hole is unambiguously known outside our Galaxy. The (near-)circular orbit and kinematics of VFTS 243 imply that the collapse of the progenitor into a black hole was associated with little or no ejected material or black-hole kick. Identifying such unique binaries substantially impacts the predicted rates of gravitational-wave detections and properties of core-collapse supernovae across the cosmos.

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Creator Shenar T.; Sana H.; Mahy L.; El-Badry K.; Marchant P.; Langer N.,Hawcroft C.; Fabry M.; Sen K.; Almeida L.A.; Abdul-Masih M.,Bodensteiner J.; Crowther P.A.; Gieles M.; Gromadzki M.; Henault-Brunet V.,Herrero A.; de Koter A.; Iwanek P.; Kozlowski S.; Lennon D.J.,Maiz Apellaniz J.; Mroz P.; Moffat A.F.J.; Picco A.; Pietrukowicz P.,Poleski R.; Rybicki K.; Schneider F.R.N.; Skowron D.M.; Skowron J.,Soszynski I.; Szymanski M.K.; Toonen S.; Udalski A.; Ulaczyk K.; Vink J.S.,Wrona M.
Publisher CDS
Publication Year 2022
OpenAccess true
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Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy