J/A+A/544/A155ivo://CDS.VizieR/J/A+A/544/A155doi:10.26093/cds/vizier.35440155CDSFederici L.Cacciari C.Bellazzini M.Fusi Pecci F.Galleti S.,Perina S.2018-01-12T13:49:58Z2013-08-30T16:26:37ZCDS support team

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

cds-question@unistra.frgalaxiesglobular-star-clustershst-photometryWe have derived a new calibration of the MV(HB)-[Fe/H] relation by exploiting the large photometric database of old GCs in M31 in the HST archive. We collected BVI data for 48 old GCs in M31 and analysed them by applying the same methods and procedures to all objects. We obtained a set of homogeneous colour-magnitude diagrams (CMDs) that were best-fitted with the fiducial CMD ridge lines of selected Milky Way template GCs. Reddening, metallicity, horizontal branch (HB) luminosity and distance were determined self-consistently for each cluster. There are three main results of this study: i) the relation MV(HB)=0.25(+/-0.02)[Fe/H]+0.89(+/-0.03), which is obtained from the above parameters and is calibrated on the distances of the template Galactic GCs; ii) the distance modulus to M31 of (m-M)_0_=24.42+/-0.06mag, that is the first determination of the distance to M31 based on the characteristics of its GC system, and is calibrated on Galactic GCs, iii) the distance to the Large Magellanic Cloud (LMC), which is estimated to be 18.54+/-0.07mag as a consequence of the previous results.2012A&A...544A.155Fhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/544/A155CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/507/1375 : HST/ACS VI data of M31 globular clusters (Perina+, 2009)J/A+A/531/A155 : HST photometry in six M31 globular clusters (Perina+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/544/A155https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/544/A155http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/544/A155https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/544/A155https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/544/A155http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/544/A155GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/544/A155/clusters (List of studied clusters)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A155/clusters?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A155/clusters?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A155/clusters?GETtext/xml+votable180.050000true10.11037541.45741670.005555555555555556Cone search capability for table J/A+A/544/A155/pc2 ({(VI)} photometry of individual stars from PC/WFPC2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A155/pc2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A155/pc2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A155/pc2?GETtext/xml+votable180.050000true10.107196141.45478030.005555555555555556Cone search capability for table J/A+A/544/A155/foc ({(BV)} photometry of individual stars from FOC)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A155/foc?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A155/foc?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A155/foc?GETtext/xml+votable180.050000true12.416693141.59041360.005555555555555556Cone search capability for table J/A+A/544/A155/pc2e (Combined table from original tables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A155/pc2e?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A155/pc2e?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A155/pc2e?GETtext/xml+votable180.050000true10.13479541.36093810.005555555555555556Cone search capability for table J/A+A/544/A155/acs ({(VI)} photometry of individual stars from WFC/ACS (DOLPHOT reduction))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/544/A155/acs?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/544/A155/acs?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/544/A155/acs?GETtext/xml+votable180.050000true6.695831439.74943860.0055555555555555565/677 6/2591 2598 2606-2607 2621-2624 2656 2658 2666 2668 2695 2704-2705 2712-2713 2753 27561.9821045660507152e-19 3.9057996558789745e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/544/A155?format=asciidefaultJ/A+A/544/A155/clustersList of studied clustersrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameCluster namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposCenter X positionpixpos.cartesian.x;instr.detintYposCenter Y positionpixpos.cartesian.y;instr.detintScale[0.014/0.12] Scalearcsec/pixinstr.scalefloatInstInstrument: FOC, PC/WFPC2, WF3/WFPC2, WFC/ACS chip1 or chip2instrcharFileNameName of the file with photometrymeta.id;phot;meta.filecharTmeta.id;meta.datasetcharVmag[13.8/18.9] V-band magnitudemagphot.mag;em.opt.VfloatR[21/441] Distance from M31 nucleusarcminpos.angDistancefloatE(B-V)[0.04/0.25] Color excessmagphot.color.excessfloatu_E(B-V)Uncertainty flag (:) on E(B-V)meta.code.errorchar[Fe/H][-2.15/-0.5] Metallicitylog(Sun)phys.abund.Zfloatu_[Fe/H]Uncertainty flag (:) on [Fe/H]meta.code.error;phys.abund.FecharV(HB)Apparent magnitude of the Horizontal Branchmagphot.mag;meta.modelledfloatu_V(HB)Uncertainty flag (:) on V(HB)meta.code.errorcharDMDistance modukus (n_M)_0_magphot.mag.distModfloatu_DMUncertainty flag (:) on DMmeta.code.errorcharSimbadNameSimbad column added by the CDSmeta.idcharJ/A+A/544/A155/pc2{(VI)} photometry of individual stars from PC/WFPC2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClCluster number (sequential number in table "clusters.dat")meta.id.parentintindexedIDIdentification numbermeta.id;meta.mainintVmagJohnson V magnitudemagphot.mag;em.opt.VfloatV-IJohnson V-I color indexmagphot.color;em.opt.V;em.opt.IfloatXposX pixel coordinatespixpos.cartesian.xfloatYposY pixel coordinatespixpos.cartesian.yfloat_RAPosition calculated from X,Y (right ascension part)degpos.eq.ra;meta.main_DEPosition calculated from X,Y (declination part)degpos.eq.dec;meta.mainJ/A+A/544/A155/foc{(BV)} photometry of individual stars from FOCrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClCluster number (sequential number in table "clusters.dat")meta.id.parentintindexedIDIdentification number within the clustermeta.id;meta.mainintVmagJohnson V magnitudemagphot.mag;em.opt.VfloatB-VJohnson B-V color indexmagphot.color;em.opt.B;em.opt.VfloatXposX pixel coordinatespixpos.cartesian.xfloatYposY pixel coordinatespixpos.cartesian.yfloat_RAPosition calculated from X,Y (right ascension part)degpos.eq.ra;meta.main_DEPosition calculated from X,Y (declination part)degpos.eq.dec;meta.mainJ/A+A/544/A155/pc2eCombined table from original tablesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClCluster number (sequential number in table "clusters.dat")meta.id.parentintindexedIDIdentification number within the clustermeta.id;meta.maindoubleVmagJohnson V magnitudemagphot.mag;em.opt.Vfloate_Vmag1-sigma uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatImag? Johnson I magnitudemagphot.mag;em.opt.Ifloatnullablee_Imag1-sigma uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatXposX pixel coordinatespixpos.cartesian.xfloatYposY pixel coordinatespixpos.cartesian.yfloat_RAPosition calculated from X,Y (right ascension part)degpos.eq.ra;meta.main_DEPosition calculated from X,Y (declination part)degpos.eq.dec;meta.mainJ/A+A/544/A155/acs{(VI)} photometry of individual stars from WFC/ACS (DOLPHOT reduction)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClCluster number (sequential number in table "clusters.dat")meta.id.parentintindexedIDIdentification numbermeta.id;meta.mainintXposX pixel coordinatespixpos.cartesian.xfloatYposY pixel coordinatespixpos.cartesian.yfloatVmagV band magnitudemagphot.mag;em.opt.VfloatImagI band magnitudemagphot.mag;em.opt.IfloatF606WF606W band magnitude (Vegamag system)magphot.mag;em.opt.RfloatF814WF814W band magnitude (Vegamag system)magphot.mag;em.opt.Ifloate_F606W1-sigma uncertainty in F606Wmagstat.errorfloate_F814W1-sigma uncertainty in F814Wmagstat.errorfloatChiValue of the DOLPHOT/ACS {chi} statistics (1)stat.valuefloatS/NSignal-to-Noise ratiostat.snrfloatSharpDOLPHOT/ACS sharpness parameter (2)stat.fit.paramfloatCrowdDOLPHOT/ACS crowding parameter (3)magstat.fit.paramfloatChipACS/WFC chip numberobs.fieldint_RAPosition calculated from X,Y (right ascension part)degpos.eq.ra;meta.mainindexed_DEPosition calculated from X,Y (declination part)degpos.eq.dec;meta.mainindexed