J/other/NatAs/6.ivo://CDS.VizieR/J/other/NatAs/6.1085doi:10.26093/cds/vizier/dt/gkbaifCDSShenar 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.2026-03-04T20:03:22Z2022-12-30T08:29:51ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmagellanic-cloudsvariable-starsphotometryvisible-astronomyStellar-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.2022NatAs...6.1085Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/other/NatAs/6.1085CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/other/NatAs/6.1085https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/other/NatAs/6.1085http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/other/NatAs/6.1085https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/other/NatAs/6.1085https://vizier.iucaa.in/viz-bin/votable?-source=J/other/NatAs/6.1085http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/other/NatAs/6.1085GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 2.6706780932288093e-19OpticaldefaultJ/other/NatAs/6.1085/vfts243OGLE III and IV light curve for VFTS 243recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian date (JD-2450000)dtime.epochdoubleImagOGLE I magnitudemagphot.mag;em.opt.Idoublee_Imagrms uncertainty on OGLE I magnitudemagstat.error;phot.magdouble