J/A+A/532/A103ivo://CDS.VizieR/J/A+A/532/A103doi:10.26093/cds/vizier.35320103CDSLodieu N.de Wit W.J.Carraro G.Moraux E.Bouvier J.Hambly N.C.2017-06-19T07:57:33Z2013-02-01T12:33:00ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryproper-motionsstellar-spectral-typesKnowledge of the mass function in open clusters constitutes one way to constrain the formation of low-mass stars and brown dwarfs along with the knowledge of the frequency of multiple systems and the properties of disks. The aim of the project is to determine the shape of the mass function in the low-mass and substellar regimes in the pre-main sequence (27Myr) cluster IC4665 located at 350pc from the Sun. We have cross-matched the near-infrared photometric data from the Eighth Data Release (DR8) of the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS) with previous optical data obtained with the Canada-France-Hawaii (CFH) wide-field camera to improve the determination of the luminosity and mass functions in the low-mass and substellar regimes. The availability of i and z photometry taken with the CFH12K camera on the Canada France Hawaii Telescope added strong constraints to the UKIDSS photometric selection in this cluster located in a dense region of our Galaxy. We have derived the luminosity and mass functions of the cluster down to J=18.5mag, corresponding to masses of ~0.025M_{sun}_ at the distance and age of IC4665 according to theoretical models. In addition, we have extracted new candidate members down to ~20 Jupiter masses in a previously unstudied region of the cluster. We have derived the mass function over the 0.6-0.04M_{sun}_ mass range and found that it is best represented by a log-normal function with a peak at 0.25-0.16M_{sun}_, consistent with the determination in the Pleiades.2011A&A...532A.103Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/532/A103CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/314 : UKIDSS-DR8 LAS, GCS and DXS Surveys (Lawrence+ 2012)J/A+A/448/189 : IzJHK photometry of IC4665 (de Wit+, 2006)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/532/A103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/532/A103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/532/A103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/532/A103https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/532/A103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/532/A103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/532/A103/IC4665 (Coordinates, photometry, proper motions, and physical parameters for IC4665 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/532/A103/IC4665?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/532/A103/IC4665?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/532/A103/IC4665?GETtext/xml+votable180.050000true265.52470835.40386110.0055555555555555565/7947 6/31779 31785 31787 31873 31876-318778.305533028865447e-20 2.8354674469436256e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/532/A103?format=asciiOpticalInfrareddefaultJ/A+A/532/A103/IC4665Coordinates, photometry, proper motions, and physical parameters for IC4665 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMmSimbad column added by the CDSmeta.code.membercharNameName following IAU nomenclature (G1)meta.id;meta.maincharimag? I-band magnitude from the CFH12Kmagphot.mag;em.opt.Ifloatnullablezmag? z-band magnitude from the CFH12Kmagphot.mag;em.opt.IfloatnullableZmag? UKIDSS/Z-band magnitude from UKIDSS GCS DR8magphot.mag;em.opt.IfloatnullableYmagUKIDSS/Y-band magnitude from UKIDSS GCS DR8magphot.mag;em.IR.JfloatJmagUKIDSS/J-band magnitude from UKIDSS GCS DR8magphot.mag;em.IR.JfloatHmagUKIDSS/H-band magnitude from UKIDSS GCS DR8magphot.mag;em.IR.HfloatKmagUKIDSS/K-band magnitude from UKIDSS GCS DR8magphot.mag;em.IR.KfloatpmRA?Proper motion in right ascensionmas/yrpos.pm;pos.eq.radoublenullablepmDE?Proper motion in declinationmas/yrpos.pm;pos.eq.decdoublenullablelogL?Star luminositylog(solLum)phys.luminosityfloatnullableMass?Star masssolMassphys.massfloatnullableGCSDetails from UKIDSS-DR8meta.ref.urlcharSimbadSimbad column added by the CDSmeta.refcharRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.main