J/A+A/400/891ivo://CDS.VizieR/J/A+A/400/891doi:10.26093/cds/vizier.34000891CDSMoraux E.Bouvier J.Stauffer J.R.Cuillandre J.-C.2003-04-12T19:31:38Z2003-04-12T19:31:23ZCDS support team

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

cds-question@unistra.fropen-star-clustersdwarf-starsphotometrysurveysWe present the results of a 6.4 square degrees imaging survey of the Pleiades cluster in the I and Z-bands. The survey extends up to 3{deg} from the cluster center and is 90% complete down to I~=22. It covers a mass range from 0.03M_{sun}_ to 0.48M_{sun}_ and yields 40 brown dwarf candidates (BDCs) of which 29 are new. The spatial distribution of BDCs is fitted by a King profile in order to estimate the cluster substellar core radius. The Pleiades mass function is then derived across the stellar-substellar boundary and we find that, between 0.03M_{sun}_ and 0.48M_{sun}_, it is well represented by a single power-law, dN/dM{prop.to}M^-{alpha}^, with an index alpha=0.60+/-0.11. Over a larger mass domain, however, from 0.03M_{sun}_ to 10M_{sun}_, the mass function is better fitted by a log-normal function. We estimate that brown dwarfs represent about 25% of the cluster population which nevertheless makes up less than 1.5% of the cluster mass. The early dynamical evolution of the cluster appears to have had little effect on its present mass distribution at an age of 120Myr. Comparison between the Pleiades mass function and the Galactic field mass function suggests that apparent differences may be mostly due to unresolved binary systems.2003A&A...400..891Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/400/891CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/323/139 : K magnitude of Pleiades low-mass binaries (Bouvier+ 1997)J/A+A/335/183 : Pleiades low-mass stars rotational velocities (Queloz+ 1998)J/A+AS/100/607 : Pleiades very low-mass proper motion members (Hambly+ 1993)J/MNRAS/313/347 : Pleiades low-mass stars and brown dwarfs (Pinfield+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/400/891https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/400/891http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/400/891https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/400/891https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/400/891http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/400/891GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/400/891/table3 (I and Z photometry of Pleiades star members)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/400/891/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/400/891/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/400/891/table3?GETtext/xml+votable180.050000true57.79812524.38702780.0055555555555555565/118 124 6/465-467 478 485 500 504https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/400/891?format=asciiOpticaldefaultJ/A+A/400/891/table3I and Z photometry of Pleiades star membersI-ZI-Z color indexmagphot.colorfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.idintImagMould I magnitude (822.3nm)magphot.mag;em.opt.IfloatRAJ2000Right ascension (J2000.0)pos.eq.ra;meta.mainDEJ2000Declination (J2000.0)pos.eq.dec;meta.main