Abstract
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 10.4 d, 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 5σ 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.
Original language | English |
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Pages (from-to) | 1085-1092 |
Number of pages | 8 |
Journal | Nature Astronomy |
Volume | 6 |
Issue number | 9 |
DOIs | |
State | Published - Sep 2022 |
Externally published | Yes |
Funding
Funders | Funder number |
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European Society of Anaesthesiology | |
Cambridge Astronomical Survey Unit | |
Belgian Federal Science Policy Office | |
European School of Oncology | |
European Research Council | |
Not added | 639.041.645 |
European Union’s Horizon 2020 Programme | 182.D-0222, 090.D-0323, 092.D-0136, 101024605 |
Fonds Wetenschappelijk Onderzoek | 12ZY520N |
Science and Technology Facilities Council | ST/V000853/1 |
Onderzoeksraad, KU Leuven | C16/17/007: MAESTRO |
Spanish Government Ministerio de Ciencia, Innovación y Universidades | VFTS 243, PGC2018-095-049-B-C22 |
Ministerio de Ciencia e Innovación | EUR2020-112157, 945806 |
Natural Sciences and Engineering Research Council of Canada | RGPIN-2020-05990 |
Ministry of Communications and Information, Singapore | PGC-2018-0913741-B-C22, CEX2019-000920-S |
Deutsche Forschungsgemeinschaft | EXC 2181/1-390900948 |
Horizon 2020 Framework Programme | 772225 |
Netherlands Research Council NWO | VENI 639.041.645, VIDI 203.061 |