J/A+A/578/A4ivo://CDS.VizieR/J/A+A/578/A4doi:10.26093/cds/vizier.35780004CDSStolteA.HussmannB.OlczakC.BrandnerW.HabibiM.GhezA. M.MorrisM. R.LuJ. R.ClarksonW. I.AndersonJ.2015-09-21T13:56:07Z2015-05-22T07:49:49ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-sourcesinfrared-photometryproper-motionsWe investigate the circumstellar disc fraction as determined from L-band excess observations of the young, massive Arches and Quintuplet clusters residing in the central molecular zone of the Milky Way. The Quintuplet cluster was searched for L-band excess sources for the first time. We find a total of 26 excess sources in the Quintuplet cluster, and 21 sources with L-band excesses in the Arches cluster, of which 13 are new detections. With the aid of proper motion membership samples, the disc fraction of the Quintuplet cluster could be derived for the first time to be 4.0+/-0.7. There is no evidence for a radially varying disc fraction in this cluster. In the case of the Arches cluster, a disc fraction of 9.2+/-1.2 approximately out to the cluster's predicted tidal radius, r<1.5pc (Habibi et al., 2013A&A...556A..26H, Cat. J/A+A/556/A26), is found. This excess fraction is consistent with our previously found disc fraction in the cluster in the radial range 0.3<r<0.8pc. In both clusters, the host star mass range covers late A to early B-type stars, 2<M<15M_{sun}, as derived from J-band photospheric magnitudes. We discuss the unexpected finding of dusty circumstellar discs in these UV intense environments in the context of primordial disc survival and formation scenarios of secondary discs. We consider the possibility that the L-band excess sources in the Arches and Quintuplet clusters could be the high-mass counterparts to T Tauri pre-transitional discs. As such a scenario requires a long pre-transitional disc lifetime in a UV intense environment, we suggest that mass transfer discs in binary systems are a likely formation mechanism for the B-star discs observed in these starburst clusters.2015A&A...578A...4Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/578/A4CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/319 : UKIDSS-DR9 LAS, GCS, and DXS Surveys (Lawrence+ 2012)J/A+A/540/A57 : Quintuplet infrared photometry, masses (Hussmann+ 2012)J/A+A/556/A26 : Arches cluster: IR phot., extinction and masses (Habibi+, 2013)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/578/A4https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/578/A4http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/578/A4https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/578/A4https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/578/A4http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/578/A4GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/578/A4/tablee1 (Quintuplet cluster JHKsL' photometry and proper motions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/578/A4/tablee1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/578/A4/tablee1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/578/A4/tablee1?GETtext/xml+votable180.050000true266.5640736-28.82816940.005555555555555556Cone search capability for table J/A+A/578/A4/tablee2 (Arches cluster JHKsL' photometry and proper motions)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/578/A4/tablee2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/578/A4/tablee2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/578/A4/tablee2?GETtext/xml+votable180.050000true266.4574361-28.82276810.0055555555555555566/288304.80103776935426e-20 1.6013215698023027e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/578/A4?format=asciiInfrareddefaultJ/A+A/578/A4/tablee1Quintuplet cluster JHKsL' photometry and proper motionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/10308] Sequential number within the clustermeta.recordintFld[1/5] Field numbermeta.id;obs.fieldintoRA[-48/45] Right ascension offset (J2000) (1)arcsecpos.eq.ra;arith.difffloatoDE[-51/44] Declination offset (J2000) (1)arcsecpos.eq.dec;arith.difffloatJmag[11.7/25.3] HST/WFC3 F127M J photometrymagphot.mag;em.IR.Jfloate_Jmag[0/1.1] F127M J photometric uncertaintymagstat.error;phot.mag;em.IR.JfloatHmag[9.594/24.005] HST/WFC3 F153M H photometrymagphot.mag;em.IR.Hfloate_Hmag[0/1.1] F153M H photometric uncertaintymagstat.error;phot.mag;em.IR.HfloatEpoch1[2002/2009.3] Epoch of Ks1 astrometryyrtime.epochdoubleKsmag1? VLT/CONICA Ks photometry 1st epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag1? Ks1 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableEpoch2[2008/2012.6] Epoch of Ks2 astrometryyrtime.epochdoubleKsmag2? VLT/CONICA Ks photometry 2nd epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag2? Ks2 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableEpoch3[2011/2012.5]? Epoch of Ks3 astrometryyrtime.epochdoublenullableKsmag3? VLT/CONICA Ks photometry 3rd epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag3? Ks3 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableL'mag? VLT/CONICA L' photometrymagphot.mag;em.IR.3-4umfloatnullablee_L'mag? L' relative photometric uncertaintymagstat.error;phot.mag;em.IR.3-4umfloatnullablepmRA? Proper motion in RA (2)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Proper motion RA uncertainty (3)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in DE (2)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Proper motion DE uncertainty (3)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableMmb[-1/1]? Membership indicator, 1=yes (4)meta.code.member;instr.setupintnullableExc[0/1]? L' excess source indicatorphot.flux;arith.ratiointnullablepMmb[0/1]? Membership probability indicator (only in tablee1.dat) (5)stat.probabilityfloatnullable_RAPosition computed from oRA and oDE offsets (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from oRA and oDE offsets (declination part)degpos.eq.dec;meta.mainJ/A+A/578/A4/tablee2Arches cluster JHKsL' photometry and proper motionsFld[1/5] Field numbermeta.id;obs.fieldintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/10308] Sequential number within the clustermeta.recordintoRA[-48/45] Right ascension offset (J2000) (1)arcsecpos.eq.ra;arith.difffloatoDE[-51/44] Declination offset (J2000) (1)arcsecpos.eq.dec;arith.difffloatJmag[11.7/25.3] HST/WFC3 F127M J photometrymagphot.mag;em.IR.Jfloate_Jmag[0/1.1] F127M J photometric uncertaintymagstat.error;phot.mag;em.IR.JfloatHmag[9.594/24.005] HST/WFC3 F153M H photometrymagphot.mag;em.IR.Hfloate_Hmag[0/1.1] F153M H photometric uncertaintymagstat.error;phot.mag;em.IR.HfloatEpoch1[2002/2009.3] Epoch of Ks1 astrometryyrtime.epochdoubleKsmag1? VLT/CONICA Ks photometry 1st epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag1? Ks1 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableEpoch2[2008/2012.6] Epoch of Ks2 astrometryyrtime.epochdoubleKsmag2? VLT/CONICA Ks photometry 2nd epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag2? Ks2 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableEpoch3[2011/2012.5]? Epoch of Ks3 astrometryyrtime.epochdoublenullableKsmag3? VLT/CONICA Ks photometry 3rd epochmagphot.mag;em.IR.Kfloatnullablee_Ksmag3? Ks3 photometric uncertaintymagstat.error;phot.mag;em.IR.KfloatnullableL'mag? VLT/CONICA L' photometrymagphot.mag;em.IR.3-4umfloatnullablee_L'mag? L' relative photometric uncertaintymagstat.error;phot.mag;em.IR.3-4umfloatnullablepmRA? Proper motion in RA (2)mas/yrpos.pm;pos.eq.rafloatnullablee_pmRA? Proper motion RA uncertainty (3)mas/yrstat.error;pos.pm;pos.eq.rafloatnullablepmDE? Proper motion in DE (2)mas/yrpos.pm;pos.eq.decfloatnullablee_pmDE? Proper motion DE uncertainty (3)mas/yrstat.error;pos.pm;pos.eq.decfloatnullableMmb[-1/1]? Membership indicator, 1=yes (4)meta.code.member;instr.setupintnullableExc[0/1]? L' excess source indicatorphot.flux;arith.ratiointnullablepMmb[0/1]? Membership probability indicator (only in tablee1.dat) (5)stat.probabilityfloatnullable_RAPositions computed from oRA and oDE offsets (right ascension part)degpos.eq.ra;meta.main_DEPositions computed from oRA and oDE offsets (declination part)degpos.eq.dec;meta.main