J/MNRAS/358/13ivo://CDS.VizieR/J/MNRAS/358/13doi:10.26093/cds/vizier.73580013CDSJeffries R.D.Oliveira J.M.2024-06-30T20:17:22Z2006-03-25T23:18:35ZCDS support team

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

cds-question@unistra.fropen-star-clustersdwarf-starsradial-velocitychemical-abundancesIntermediate resolution spectroscopy from the European Southern Observatory Very Large Telescope is analysed for 63 photometrically selected low-mass (0.08-0.30M_{sun}_) candidates of the open cluster NGC 2547. We have confirmed membership for most of these stars using radial velocities, and found that lithium remains undepleted for cluster stars with I>17.54+/-0.14 and Ks>14.86+/-0.12. From these results, several pre-main-sequence evolutionary models give almost model independent ages of 34-36Myr, with a precision of 10%. These ages are only slightly larger than the ages of 25-35(+/-5)Myr obtained using the same models to fit isochrones to higher mass stars descending towards the zero-age main-sequence, both in empirically calibrated and theoretical colour-magnitude diagrams. This agreement between age determinations in different mass ranges is an excellent test of the current generation of low-mass pre-main-sequence stellar models and lends confidence to ages determined with either method between 30 and 120Myr.2005MNRAS.358...13Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/358/13CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/MNRAS/335/291 : BVI photometry of NGC 2547 (Naylor+, 2002)J/MNRAS/351/1401 : RcIcZ photometry of NGC 2547 (Jeffries+, 2004)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/358/13https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/358/13http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/358/13https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/358/13https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/358/13http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/358/13GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/358/13/table1 (Targets observed)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/358/13/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/358/13/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/358/13/table1?GETtext/xml+votable180.050000true122.3238375-49.142972220.0055555555555555566/39181 391838.650015785639275e-20 1.7003137259100215e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/358/13?format=asciiOpticaldefaultJ/MNRAS/358/13/table1Targets observedID1Star designation from Jeffries et al., 2004, Cat. <J/MNRAS/351/1401> (Cl* NGC 2547 JND FF-NNNN in Simbad)meta.idintn_ID1[N] if source was not considered a photometric member in J/MNRAS/351/1401meta.notecharRAJ2000Right Ascension J2000pos.eq.ra;meta.mainDEJ2000Declination J2000pos.eq.dec;meta.mainIcmagCousins I magnitude from <J/MNRAS/351/1401>magphot.mag;em.opt.IfloatRc-IcRc-Ic colour index from <J/MNRAS/351/1401>magphot.color;em.opt.R;em.opt.IfloatIc-ZIc-Z colour index from <J/MNRAS/351/1401>magphot.colorfloatJmag? J magnitude from 2MASS <II/246>magphot.mag;em.IR.JfloatnullableHmag? H magnitude from 2MASS <II/246>magphot.mag;em.IR.HfloatnullableKsmag? Ks magnitude from 2MASS <II/246>magphot.mag;em.IR.KfloatnullableSpTypeEstimated MK spectral typesrc.spTypecharRV1Relative radial velocity on night 1km/sphys.veloc;pos.heliocentricfloatn_RV1[b] indicates broadened linesmeta.notecharRV2? Relative radial velocity on night 2km/sphys.veloc;pos.heliocentricfloatnullablen_RV2[b] indicates broadened linesmeta.notecharf_RV2[V] indicates a variable velocitymeta.codecharSNRempirical spectrum signal-to-noise ratiostat.snrintl_LiLimit flag (<) on Limeta.codecharLiEquivalent width of the Li 6708{AA} feature0.1nmspect.line.widthfloate_Li? Mean error on Li0.1nmstat.errorfloatnullablen_Li[b] indicates a broadened Li linemeta.notecharMem[1,4] Membership status (1)meta.code.memberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJOIdentifier used in this paper, Cl* NGC 2547 JO NN in Simbadmeta.id;meta.mainintFieldField designation, from Jeffries et al., 2004, Cat. <J/MNRAS/351/1401>obs.fieldchar