J/MNRAS/347/101ivo://CDS.VizieR/J/MNRAS/347/101doi:10.26093/cds/vizier.73470101CDSSandquist E.L.2024-06-29T20:14:42Z2018-08-23T07:45:40ZCDS support team

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

cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryWe have calibrated and combined an extensive set of BVI observations of M67 to produce a colour-magnitude diagram of stars measured with high relative precision. We have selected stars that are most likely to be single-star members of the cluster using proper motion, radial velocity, and variability information from the literature, and an examination of the most probable colour-magnitude diagram locations of unresolved stellar blends. We have made detailed comparisons of our photometry of the selected stars with theoretical models, and discuss the most notable discrepancies. Observations of M67 turn-off stars are a severe test of algorithms attempting to describe convective cores in the limit of small extent, and we find strong evidence of a 'hook' just fainter than the turn-off gap. The stars in M67 support assertions that the degree of convective core overshooting decreases to zero for stars with masses in the range 1.0<(M/M_{sun}_)<=1.5, but that the degree of overshoot is smaller than currently used in published isochrones. We also verify that all current theoretical models for the lower main sequence (with the exception of Baraffe et al., 1998, Cat. J/A+A/337/403) are too blue for MV>~6, even when the sequences are shifted to match M67 near the MV of the Sun, probably due to a combination of problems with colour-Teff transformations and realistic surface boundary conditions for models. Finally, we identify a subset of cluster members with unusual photometry (candidate red giant binaries, blue straggler stars, and triple systems) deserving of further study.2004MNRAS.347..101Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/347/101CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/300 : PM2000 Bordeaux Proper Motion catalogue (Ducourant+, 2006)J/AJ/106/181 : CCD photometry of open cluster M67 (Montgomery+ 1993)J/A+AS/100/243 : Proper motions in M 67 (Zhao+ 1993)J/AJ/112/628 : BATC Color Survey of M67 (Fan+ 1996)J/AN/325/740 : Astrophysical supplements to ASCC-2.5 (Kharchenko+, 2004)J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008)J/A+A/516/A3 : Proper motions of PM2000 open clusters (Krone-Martins+ 2010)J/AJ/150/97 : Radial velocities in M67. I. 1278 candidate membersJ/MNRAS/455/2337 : M67 variable stars photometry (Nardiello+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/347/101https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/347/101http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/347/101https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/347/101https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/347/101http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/347/101GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/347/101/table4 (BVIc Photometry for M67 stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/347/101/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/347/101/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/347/101/table4?GETtext/xml+votable180.050000true132.82287511.756281110.0055555555555555566/4298https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/347/101?format=asciiOpticalInfrareddefaultJ/MNRAS/347/101/table4BVIc Photometry for M67 starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFanIDIdentification number in Fan et al, 1996AJ....112..628F, Cat. J/AJ/112/628, Cl* NGC 2682 FBC NNNN in Simbad)meta.id;meta.mainintXposX pixel positionpixpos.cartesian.xdoubleYposY pixel positionpixpos.cartesian.ydoubleBmag? Calibrated B Magnitudemagphot.mag;em.opt.Bdoublenullablee_Bmag? Uncertainty in B Magnitudemagstat.error;phot.mag;em.opt.BdoublenullableVmag? Calibrated V Magnitudemagphot.mag;em.opt.Vdoublenullablee_Vmag? Uncertainty in V Magnitudemagstat.error;phot.mag;em.opt.VdoublenullableImag? Calibrated I Magnitudemagphot.mag;em.opt.Idoublenullablee_Imag? Uncertainty in I Magnitudemagstat.error;phot.mag;em.opt.IdoublenullablePM-S? Membership Probability from Sanders, 1977A&AS...27...89Sstat.probabilityintnullablePM-G? Membership Probability from Girard et al., 1989AJ.....98..227Gstat.probabilityintnullablePM-Z? Membership Probability from Zhao et al., 1993A&AS..100..243Z, Cat. J/A+AS/100/243stat.probability;src.redshiftintnullablePM-Y? Membership Probability from Yadav et al., 2008A&A...484..609Y, Cat. J/A+A/484/609stat.probabilityintnullablePM-KM? Membership Probability from Krone-Martins et al., 2010A&A...516A...3K, Cat. J/A+A/516/A3 al., 2004AN....325..740K, Cat. J/AN/325/740stat.probabilityfloatnullablePM-N? Membership Probability from Nardiello et al., 2016MNRAS.455.2337N, J/MNRAS/455/2337stat.probabilityfloatnullableRV? Membership Probability from Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97meta.code.memberintnullableClassBinarity/Membership Classification from Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97meta.code.classcharSandID? Identification in Sanders, 1977A&AS...27...89S, Cl* NGC 2682 Sand NNNNa in Simbadmeta.idintnullableZID? Identification in Zhao et al., 1993A&AS..100..243Z, Cat. J/A+AS/100/243, CL* NGC 2682 ZTP NNNN in Simbadmeta.idintnullableMMJID? Identification in Montgomery et al., 1993AJ....106..181M, Cat. J/AJ/106/181, CL* NGC 2682 MMJ NNNN and CL* NGC 2682 MMJS NN in Simbadmeta.idintnullableWOCS? Identification in Geller et al., 2015AJ....150...97G, Cat. J/AJ/150/97, [GLM2015] WOCS NNNNN in Simbad)meta.idintnullableYadID? Identification in Yadav et al., 2008A&A...484..609Y, Cat. J/A+A/484/609, Cl* NGC 2682 YBP NNNN in Simbad)meta.idintnullablePM2000? Identification in Krone-Martins et al., 2010A&A...516A...3K, Cat. J/A+A/516/A3meta.idintnullableNardID? Identification in Nardiello et al., 2016MNRAS.455.2337N, Cat. J/MNRAS/455/2337meta.idintnullableRAJ2000? Right Ascension J2000, Epoch 2000.0degpos.eq.ra;meta.mainnullableDEJ2000? Declination J2000, Epoch 2000.0degpos.eq.dec;meta.mainnullableSimbadNameSimbad column added by the CDSmeta.idchar