J/AJ/165/105ivo://CDS.VizieR/J/AJ/165/105doi:10.26093/cds/vizier.51650105CDSTwarog B.A.Anthony-Twarog B.J.Deliyannis C.P.2024-12-10T20:08:06Z2023-06-29T13:11:21ZCDS support team

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

cds-question@unistra.fropen-star-clustersvisible-astronomyh-beta-photometrytwo-color-diagramsPrecision CCD uvbyCaH{beta} photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005-0.020mag level to V~17. The photometry is calibrated using standards over a wide range in luminosity and temperature from NGC752 and zeroed to the standard system via published photoelectric observations. Relative to NGC752, differential offsets in reddening and metallicity are derived using astrometric members, supplemented by radial velocity information. From single star members, offsets in the sense (M67-NGC752) are {delta}E(b-y)=-0.005{+/-}0.001(sem)mag from 327 F/G dwarfs and {delta}[Fe/H]=0.062{+/-}0.006(sem)dex from the combined m1 and hk indices of 249 F dwarfs, leading to E(b-y)=0.021{+/-}0.004(sem) and [Fe/H]M67=+0.030{+/-}0.016(sem) assuming [Fe/H]Hyades=+0.12. With probable binaries eliminated using c1, (b-y) indices, 83 members with ({pi}/{sigma}{pi})>50 generate (m-M)0=8.220{+/-}0.005(sem) for NGC752 and an isochronal age of 1.45{+/-}0.05Gyr. Using the same parallax restriction for 312 stars, M67 has (m-M)=9.77{+/-}0.02(sem), leading to an age tied solely to the luminosity of the subgiant branch of 3.70{+/-}0.03Gyr. The turnoff color spread implies {+/-}0.1Gyr, but the turnoff morphology defines a younger age/higher mass for the stars, consistent with recent binary analysis and broadband photometry indicating possible missing physics in the isochrones. Anomalous stars positioned blueward of the turnoff are discussed.2023AJ....165..105Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/165/105CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toII/47 : Scanner Abundance in late-type evolved stars (Spinrad+ 1969)II/183 : UBVRI Photometric Standards (Landolt 1992)I/345 : Gaia DR2 (Gaia Collaboration, 2018)J/PASP/106/281 : Photometry and radial velocities in NGC752 (Daniel+, 1994)J/AJ/109/2828 : CaII H and K filter photometry II. (Twarog+ 1995)J/A+A/339/423 : Velocities of red giants in NGC 752 (Mermilliod+ 1998)J/AJ/119/2282 : Stromgren photometry of IC 4651 (Anthony-Twarog+, 2000)J/MNRAS/347/101 : Precision colour-magnitude diagram of M67 (Sandquist, 2004)J/A+A/470/585 : NGC 2682 uvby-Hbeta photometry (Balaguer-Nunez+, 2007)J/A+A/485/303 : Radial velocities for 1309 stars & 166 OCl (Mermilliod+, 2008)J/ApJS/176/262 : VRI photometry & theta values in open clusters (Taylor+, 2008)J/A+A/505/117 : Abundances red giants 15 globular clusters (Carretta+, 2009)J/A+A/498/949 : Velocities 1253 F-K dwarfs open clusters (Mermilliod+, 2009)J/AJ/139/2034 : NGC 6253 stars equivalent widths (Anthony-Twarog+, 2010)J/AJ/145/134 : Radial velocities of 108 stars in Ruprecht 147 (Curtis+, 2013)J/AJ/150/97 : RVvel in M67. I. 1278 candidate members (Geller+, 2015)J/MNRAS/450/4301 : Line list for red giants in open clusters (Reddy+, 2015)J/AJ/150/134 : uvbyCaH{beta} photometry of NGC 752 (Twarog+, 2015)J/A+A/585/A150 : On the metallicity of open clusters. III. (Netopil+, 2016)J/AJ/153/128 : WOCS. LXXV. Hyades&Praesepe stellar Li data (Cummings+, 2017)J/ApJ/862/33 : Improved & expanded membership catalog NGC752 (Agueros+, 2018)J/AJ/156/37 : Photo. & Li abund. cool dwarfs in M35 (Anthony-Twarog+, 2018)J/A+A/618/A93 : Gaia DR2 open clusters in the Milky Way (Cantat-Gaudin+, 2018)J/AJ/158/163 : Li abundance values for stars in NGC 6819 (Deliyannis+, 2019)J/ApJ/878/99 : Abundances dwarfs & giants in NGC752 with HIRES (Lum+, 2019)J/AJ/158/82 : DS Andromedae radial velocity & photometry (Milone+, 2019)J/MNRAS/491/544 : NGC752 abundances from IR spectra (Bocek Topcu+, 2020)J/AJ/159/199 : OCCAM. IV. Open cluster abund. with APOGEE DR16 (Donor+, 2020)J/AJ/159/246 : WIYN open cluster study. LXXX. Photometry NGC7142 (Sun+, 2020)J/AJ/161/190 : Radial Velocities of binary population in M67 (Geller+, 2021)J/MNRAS/503/236 : UVIT catalog & membership of 6 open clusters (Jadhav+, 2021)J/A+A/650/A67 : Blue and yellow straggler stars in open clusters (Rain+, 2021)J/AJ/163/195 : Open Cluster Chemical Abund. & Mapping Survey.V. (Ray+, 2022)J/AJ/165/6 : BD+37410 & DSAnd light curve & RVel (Sandquist+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/165/105https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/165/105http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/165/105https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/165/105https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/165/105http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/165/105GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/165/105/table1 (Merged photoelectric secondary standards in M67)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/105/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/105/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/105/table1?GETtext/xml+votable180.050000true132.7214711.792820.005555555555555556Cone search capability for table J/AJ/165/105/table2 (Internal photoelectric hk secondary standards in M67)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/105/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/105/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/105/table2?GETtext/xml+votable180.050000true132.7990311.756130.005555555555555556Cone search capability for table J/AJ/165/105/table4 (Stromgren photometry in M67)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/165/105/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/165/105/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/165/105/table4?GETtext/xml+votable180.050000true132.5775511.407830.0055555555555555566/4253 4255 4296 4298 4320https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/165/105?format=asciiOpticaldefaultJ/AJ/165/105/table1Merged photoelectric secondary standards in M67SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWEBDAIdentification, WEBDAmeta.id;meta.mainintRAJ2000[132/134] Right Ascension (J2000 at Epoch 2016)degpos.eq.ra;meta.mainDEJ2000[11/12] Declination (J2000 at Epoch 2016)degpos.eq.dec;meta.mainb-y[-0.04/0.49]? The (b-y) colormagphot.color;em.opt.B;em.opt.Vfloatnullablee_b-y[0.001/0.02]? Uncertainty (sem) in b-ymagstat.error;phot.color;em.opt.Bfloatnullablem1[0.12/0.25]? The m_1_ indexmagphot.colorfloatnullablee_m1[0.002/0.02]? Uncertainty (sem) in c1magstat.errorfloatnullablec1[0.28/1.11]? The c_1_ indexmagphot.colorfloatnullablee_c1[0.002/0.02]? Uncertainty (sem) in m1magstat.errorfloatnullableHb[2.6/2.92]? The H{beta} indexmagspect.indexfloatnullablee_Hb[0.001/0.02]? Uncertainty (sem) in Hbmagstat.errorfloatnullableNote[1/2]? Calibration Classification (1)meta.noteintnullableJ/AJ/165/105/table2Internal photoelectric hk secondary standards in M67SimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintWEBDAIdentification, WEBDAmeta.id;meta.mainintRAJ2000[132/134] Right Ascension (J2000 at Epoch 2016)degpos.eq.ra;meta.mainDEJ2000[11/13] Declination (J2000 at Epoch 2016)degpos.eq.dec;meta.mainb-y[-0.03/0.85] The (b-y) colormagphot.color;em.opt.B;em.opt.Vfloate_b-y[0/0.02] Uncertainty (std) in b-ymagstat.error;phot.color;em.opt.Bfloathk[0.14/1.63] The hk indexmagspect.indexfloate_hk[0/0.03] Uncertainty (std) in hkmagstat.errorfloatNum[1/8] Number of measurementsmeta.numberintJ/AJ/165/105/table4Stromgren photometry in M67recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000[132/134] Right Ascension (J2000 at Epoch 2016)degpos.eq.ra;meta.mainDEJ2000[11/13] Declination (J2000 at Epoch 2016)degpos.eq.dec;meta.mainVmag[8.75/20] The V band magnitudemagphot.mag;em.opt.Vfloatb-y[-0.21/1.41] The (b-y) colormagphot.color;em.opt.B;em.opt.Vfloatm1[-0.86/0.9]? The m_1_ indexmagphot.colorfloatnullablec1[-0.89/1.31]? The c_1_ indexmagphot.colorfloatnullablehk[-1.58/2.01]? The hk indexmagspect.indexfloatnullableHb[2.28/2.92]? The H{beta} indexmagspect.indexfloatnullablee_Vmag[0/0.2] Uncertainty (sem) in Vmagmagstat.error;phot.magfloate_b-y[0.001/0.2] Uncertainty (sem) in b-ymagstat.error;phot.color;em.opt.Bfloate_m1[0.001/0.3]? Uncertainty (sem) in m1magstat.errorfloatnullablee_c1[0.001/0.4]? Uncertainty (sem) in c1magstat.errorfloatnullablee_hk[0.001/0.3]? Uncertainty (sem) in hkmagstat.errorfloatnullablee_Hb[0.001/0.3]? Uncertainty (sem) in Hbmagstat.errorfloatnullableNy[1/64] Number of y filter observationsmeta.numberintNb[1/61] Number of b filter observationsmeta.numberintNv[0/58] Number of v filter observationsmeta.numberintNu[0/59] Number of u filter observationsmeta.numberintNCa[0/67] Number of Ca filter observationsmeta.numberintNn[0/58] Number of H{beta} narrow filter observationsmeta.numberintNw[0/59] Number of H{beta} wide filter observationsmeta.numberintClassCalibration Classification (1)src.classchar