J/ApJ/718/810ivo://CDS.VizieR/J/ApJ/718/810doi:10.26093/cds/vizier.17180810CDSStolte A.Morris M.R.Ghez A.M.Do T.Lu J.R.Wright S.A.Ballard C.,Mills E.Matthews K.2012-09-23T16:24:36Z2012-07-27T09:08:28ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryproper-motionsob-starsDeep Keck/NIRC2 HK'L' observations of the Arches cluster near the Galactic center reveal a significant population of near-infrared excess sources. We combine the L'-band excess observations with K'-band proper motions, which allow us to confirm cluster membership of excess sources in a starburst cluster for the first time. The robust removal of field contamination provides a reliable disk fraction down to our completeness limit of H=19mag, or ~5M_{sun}_ at the distance of the Arches. Of the 24 identified sources with K'-L'>2.0mag, 21 have reliable proper motion measurements, all of which are proper motion members of the Arches cluster. VLT/SINFONI K'-band spectroscopy of 3 excess sources reveals strong CO bandhead emission, which we interpret as the signature of dense circumstellar disks. The detection of strong disk emission from the Arches stars is surprising in view of the high mass of the B-type main sequence host stars of the disks and the intense starburst environment. We find a disk fraction of 6%+/-2% among B-type stars in the Arches cluster. A radial increase in the disk fraction from 3% to 10% suggests rapid disk destruction in the immediate vicinity of numerous O-type stars in the cluster core. A comparison between the Arches and other high- and low-mass star-forming regions provides strong indication that disk depletion is significantly more rapid in compact starburst clusters than in moderate star-forming environments.2010ApJ...718..810Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/718/810CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/501/563 : HKs photometry in the Arches cluster (Espinoza+, 2009)J/MNRAS/371/38 : X-ray observations of the Galaxy center (Wang+, 2006)J/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/ApJ/718/810https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/718/810http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/718/810https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/718/810https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/718/810http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/718/810GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/718/810/table4 (Photometry and astrometry source list of the Arches cluster)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/718/810/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/718/810/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/718/810/table4?GETtext/xml+votable180.050000true266.4600833-28.82286110.0055555555555555566/288304.925240337479573e-20 1.2934455535160846e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/718/810?format=asciiInfrareddefaultJ/ApJ/718/810/table4Photometry and astrometry source list of the Arches clusterrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDRunning identification number (\dicS{[SMG2010b] NNNN} in Simbad)meta.id;meta.mainintFieldField name (1)obs.fieldcharoRARight Ascension offset (2)arcsecpos.eq.ra;arith.difffloatoDEDeclination offset (2)arcsecpos.eq.dec;arith.difffloate_oRAPositional uncertainty in dRAarcsecstat.errorfloate_oDEPositional uncertainty in dDEarcsecstat.errorfloatHmagKeck/NIRC2 H band magnitudemagphot.mag;em.IR.Hfloate_HmagUncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatK'magKeck/NIRC2 K' band magnitudemagphot.mag;em.IR.Kfloate_K'magUncertainty in K'magmagstat.error;phot.mag;em.IR.KfloatL'mag? Keck/NIRC2 L' band magnitudemagphot.mag;em.IR.3-4umfloatnullablee_L'mag? Uncertainty in L'magmagstat.error;phot.mag;em.IR.3-4umfloatnullableDtTime baseline for proper motion measurementyrinstr.baselinefloatxpmProper motion in x (pmRA*cos(DE))mas/yrpos.pm;pos.eq.rafloatypmProper motion in y (pmDE)mas/yrpos.pm;pos.eq.decfloatMm2{sigma} membership candidate (0=no, 1=yes) (3)meta.code.memberintExL band excess sources? (1=excess) (4)meta.codeint_RAPositions from offsets relative to the brightest K-band source in the Arches core: J174550.42-284922.3 (right ascension part)degpos.eq.ra;meta.main_DEPositions from offsets relative to the brightest K-band source in the Arches core: J174550.42-284922.3 (declination part)degpos.eq.dec;meta.main