J/A+A/631/A57ivo://CDS.VizieR/J/A+A/631/A57doi:10.26093/cds/vizier.36310057CDSMiret-Roig N.Bouy H.Olivares J.Sarro L.-M.Tamura M.Allen L.,Bertin E.Serre S.Berihuete A.Beletsky Y.Barrado D.Huelamo N.,Cuillandre J.-C.Moraux E.Bouvier J.2019-10-21T06:17:34Z2019-10-21T06:42:56ZCDS support team

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

cds-question@unistra.frmilky-way-galaxyopen-star-clustersproper-motionsvisible-astronomytrigonometric-parallaxphotometryThe study of star formation is extremely challenging due to the lack of complete and clean samples of young, nearby clusters, and star forming regions. The recent Gaia DR2 catalogue complemented with the deep, ground based COSMIC DANCe catalogue offers a new database of unprecedented accuracy to revisit the membership of clusters and star forming regions. The 30 Myr open cluster IC 4665 is one of the few well-known clusters of this age and it is an excellent target where to test evolutionary models and study planetary formation. We aim to provide a comprehensive membership analysis of IC 4665 and to study the following properties: empirical isochrones, distance, magnitude distribution, present-day system mass function, and spatial distribution. We use the Gaia DR2 catalogue together with the DANCe catalogue to look for members using a probabilistic model of the distribution of the observable quantities in both the cluster and background populations. We obtain a final list of 819 candidate members which cover a 12.4 magnitude range (7<J<19.4). We find that 50% are new candidates, and we estimate a conservative contamination rate of 20%. This unique sample of members allows us to obtain a present-day system mass function in the range of 0.02-6M_{sun}_, which reveals a number of details not seen in previous studies. In addition, they favour a spherically symmetric spatial distribution for this young open cluster. Our membership analysis represents a significant increase in the quantity and quality (low-contamination) with respect to previous studies. As such, it offers an excellent opportunity to revisit other fundamental parameters such as the age.2019A&A...631A..57Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/631/A57CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/448/189 : IzJHK photometry of IC4665 (de Wit+, 2006)J/A+A/479/141 : Iz photometry, RV and EW(Li) in IC 4665 (Manzi+, 2008)J/MNRAS/400/317 : IC 4665 low-mass members (Jeffries+, 2009)J/AJ/140/677 : BVIc photometry of IC 4665 (Cargile+, 2010)J/A+A/532/A103 : Photometry and proper motions in IC4665 (Lodieu+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/631/A57https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/631/A57http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/631/A57https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/631/A57https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/631/A57http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/631/A57GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/631/A57/table4 (Gaia DR2 catalogue of IC4665)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/631/A57/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/631/A57/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/631/A57/table4?GETtext/xml+votable180.050000true265.960133305632.827312693140.005555555555555556Cone search capability for table J/A+A/631/A57/table5 (DANCe catalogue of IC4665)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/631/A57/table5?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/631/A57/table5?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/631/A57/table5?GETtext/xml+votable180.050000true267.1153379195.3474571688999990.0055555555555555564/1986 5/7950 7968-7969 7972 6/31093 31095 31101 31103 31189 31191 31755 31758 31792 31794-31795 31881 31884-31885 318968.650015785639275e-20 3.916500758235022e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/631/A57?format=asciiOpticaldefaultJ/A+A/631/A57/table4Gaia DR2 catalogue of IC4665recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintGaiaDR2Gaia DR2 source id (source_id)meta.id;meta.mainRA_ICRSBarycentric right ascension (ICRS) at Ep=2015.5 (ra)degpos.eq.ra;meta.mainindexedDE_ICRSBarycentric declination (ICRS) at Ep=2015.5 (dec)degpos.eq.dec;meta.mainindexedGmagG-band mean magnitude (Vega) (phot_g_mean_mag)magphot.mag;em.optdoublePpin0.5Cluster membership probability at pin 0.5 (probability_pin = 0.5)stat.probabilitydoublePpin0.6Cluster membership probability at pin 0.6 (probability_pin = 0.6)stat.probabilitydoublePpin0.7Cluster membership probability at pin 0.7 (probability_pin = 0.7)stat.probabilitydoublePpin0.8Cluster membership probability at pin 0.8 (probability_pin = 0.8)stat.probabilitydoublePpin0.9Cluster membership probability at pin 0.9 (probability_pin = 0.9)stat.probabilitydouble_RA.icrsRight ascension (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.ranullableindexed_DE.icrsDeclination (ICRS) at Epoch=J2015.5 (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services)degpos.eq.decnullableindexedJ/A+A/631/A57/table5DANCe catalogue of IC4665imag? Pan-STARRS PS1 i magnitudemagphot.mag;em.opt.IdoublenullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDANCeInternal id (ID)meta.id;meta.mainintRAJ2000Right ascension (J2000) (RAJ2000)degpos.eq.ra;meta.mainindexede_RAJ2000Standard error of right ascension (e_RAJ2000)masstat.error;pos.eq.radoubleDEJ2000Declination (J2000) (DEJ2000)degpos.eq.dec;meta.mainindexede_DEJ2000Standard error of declination (e_DEJ2000)masstat.error;pos.eq.decdoublePlx? Gaia DR2 parallax (parallax)maspos.parallaxdoublenullablee_Plx? Gaia DR2 standard error of parallax (parallax_error)masstat.error;pos.parallaxfloatnullablepmRAProper motion in right ascension direction (pmRA*cosDE) (pmRA)mas/yrpos.pm;pos.eq.radoublee_pmRAStandard error of pmRA (e_pmRA)mas/yrstat.error;pos.pm;pos.eq.radoublepmDEProper motion in declination direction (pmDec)mas/yrpos.pm;pos.eq.decdoublee_pmDEStandard error of pmDec (e_pmDec)mas/yrstat.error;pos.pm;pos.eq.decdoubler_pmSource of proper motion (1)meta.ref;pos.framecharGmag? Gaia DR2 G magnitudemagphot.mag;em.optfloatnullablee_Gmag? Standard error of G magnitudemagstat.error;phot.mag;em.opt.BdoublenullableBPmag? Gaia DR2 BP magnitudemagphot.mag;em.opt.Bfloatnullablee_BPmag? Standard error of BP magnitudemagstat.error;phot.magdoublenullableRPmag? Gaia DR2 RP magnitudemagphot.mag;em.opt.Rfloatnullablee_RPmag? Standard error of RP magnitudemagstat.error;phot.magdoublenullablegmag? Pan-STARRS PS1 g magnitudemagphot.mag;em.opt.Rdoublenullablee_gmag? Standard error of Pan-STARRS PS1 g magnitudemagstat.error;phot.mag;em.opt.Bdoublenullablermag? Pan-STARRS PS1 r magnitudemagphot.mag;em.opt.Rdoublenullablee_rmag? Standard error of Pan-STARRS PS1 r magnitudemagstat.error;phot.mag;em.opt.Rdoublenullablee_imag? Standard error of Pan-STARRS PS1 i magnitudemagstat.error;phot.mag;em.opt.Idoublenullablezmag? Pan-STARRS PS1 z magnitudemagphot.mag;em.opt.Idoublenullablee_zmag? Standard error of Pan-STARRS PS1 z magnitudemagstat.error;phot.mag;em.opt.Idoublenullableymag? Pan-STARRS PS1 y magnitudemagphot.mag;em.IR.Jdoublenullablee_ymag? Standard error of Pan-STARRS PS1 y magnitudemagstat.error;phot.mag;em.opt.VdoublenullableJmag? 2MASS J magnitudemagphot.mag;em.IR.Jdoublenullablee_Jmag? Standard error of J magnitudemagstat.error;phot.mag;em.IR.JdoublenullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hdoublenullablee_Hmag? Standard error of H magnitudemagstat.error;phot.mag;em.IR.HdoublenullableKsmag? 2MASS Ks magnitudemagphot.mag;em.IR.Kdoublenullablee_Ksmag? Standard error of Ks magnitudemagstat.error;phot.mag;em.IR.KdoublenullablePpin0.5Cluster membership probability at pin 0.5 (probability_pin = 0.5)stat.probabilitydoublePpin0.6Cluster membership probability at pin 0.6 (probability_pin = 0.6)stat.probabilitydoublePpin0.7Cluster membership probability at pin 0.7 (probability_pin = 0.7)stat.probabilitydoublePpin0.8Cluster membership probability at pin 0.8 (probability_pin = 0.8)stat.probabilitydoublePpin0.9Cluster membership probability at pin 0.9 (probability_pin = 0.9)stat.probabilitydouble