J/A+A/617/A66ivo://CDS.VizieR/J/A+A/617/A66doi:10.26093/cds/vizier.36170066CDSLohr M.E.Clark J.S.Najarro F.Patrick L.R.Crowther P.A.Evans C.J.2018-09-18T07:43:18Z2018-09-13T06:58:32ZCDS support team

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

cds-question@unistra.frspectroscopic-binary-starseclipsing-binary-starsinfrared-photometryinfrared-astronomyspectroscopyWe have carried out a spectroscopic variability survey of some of the most massive stars in the Arches cluster, using K-band observations obtained with SINFONI on the VLT. One target, F2, exhibits substantial changes in radial velocity; in combination with new KMOS and archival SINFONI spectra, its primary component is found to undergo radial velocity variation with a period of 10.483+/-0.002d and an amplitude of ~350km/s. A secondary radial velocity curve is also marginally detectable. We reanalyse archival NAOS-CONICA photometric survey data in combination with our radial velocity results to confirm this object as an eclipsing SB2 system, and the first binary identified in the Arches. We model it as consisting of an 82+/-12M_{sun}_ WN8-9h primary and a 60+/-8M_{sun}_ O5-6 Ia+ secondary, and as having a slightly eccentric orbit, implying an evolutionary stage prior to strong binary interaction. As one of four X-ray bright Arches sources previously proposed as colliding-wind massive binaries, it may be only the first of several binaries to be discovered in this cluster, presenting potential challenges to recent models for the Arches' age and composition. It also appears to be one of the most massive binaries detected to date; the primary's calculated initial mass of >~120M_{sun}_ would arguably make this the most massive binary known in the Galaxy.2018A&A...617A..66Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/617/A66CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/581/258 : Infrared photometry in the Arches Cluster (Figer+ 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/617/A66https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/617/A66http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/617/A66https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/617/A66https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/617/A66http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/617/A66GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfrareddefaultJ/A+A/617/A66/s110504VLT/SINFONI spectrum with BJD(TDB) 2455685.820recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110824VLT/SINFONI spectrum with BJD(TDB) 2455797.561recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/f2primDisentangled spectrum of primary componentrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110827VLT/SINFONI spectrum with BJD(TDB) 2455800.544recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110829VLT/SINFONI spectrum with BJD(TDB) 2455802.550recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s111002VLT/SINFONI spectrum with BJD(TDB) 2455836.512recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s130808VLT/SINFONI spectrum with BJD(TDB) 2456512.611recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140804VLT/KMOS spectrum with BJD(TDB) 2456873.737recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140805VLT/KMOS spectrum with BJD(TDB) 2456874.692recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140811VLT/KMOS spectrum with BJD(TDB) 2456880.596recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110419VLT/SINFONI spectrum with BJD(TDB) 2455670.716recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110425VLT/SINFONI spectrum with BJD(TDB) 2455676.808recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110521VLT/SINFONI spectrum with BJD(TDB) 2455702.648recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110623VLT/SINFONI spectrum with BJD(TDB) 2455735.816recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110626VLT/SINFONI spectrum with BJD(TDB) 2455738.726recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110629VLT/SINFONI spectrum with BJD(TDB) 2455741.735recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110630VLT/SINFONI spectrum with BJD(TDB) 2455742.683recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s130717VLT/SINFONI spectrum with BJD(TDB) 2456490.715recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/listList of spectrarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintTitleTitle of the spectrummeta.titlecharFileNameName of the file with spectrummeta.id;meta.filecharspShow the spectrummeta.ref.urlcharJ/A+A/617/A66/f2secDisentangled spectrum of secondary componentrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110828VLT/SINFONI spectrum with BJD(TDB) 2455801.590recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140430VLT/KMOS spectrum with BJD(TDB) 2456777.831recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140723VLT/KMOS spectrum with BJD(TDB) 2456861.523recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140812VLT/KMOS spectrum with BJD(TDB) 2456881.622recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s140813VLT/KMOS spectrum with BJD(TDB) 2456882.631recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s990704Keck/NIRSPEC spectrum with BJD(TDB) 2451363.945lambdaWavelength in micrometresumem.wldoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s050610VLT/SINFONI spectrum with BJD(TDB) 2453531.755recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodoubleJ/A+A/617/A66/s110414VLT/SINFONI spectrum with BJD(TDB) 2455665.819recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlambdaWavelength in micrometresumem.wldoubleNfluxContinuum-normalised fluxphot.flux;arith.ratiodouble