J/MNRAS/349/1278ivo://CDS.VizieR/J/MNRAS/349/1278doi:10.26093/cds/vizier.73491278CDSMonaco L.Pancino E.Ferraro F.R.Bellazzini M.2024-06-29T20:14:51Z2004-06-26T17:03:57ZCDS support team

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

cds-question@unistra.frglobular-star-clustersccd-photometryWe present wide field photometry of the Galactic Globular Cluster M 22 in the B, V and I passbands for more than 186,000 stars. The study is complemented by the photometry in two narrowband filters centered on H{alpha} and the adjacent continuum, and by infrared J, H and K magnitudes derived from the 2 MASS survey for ~2000 stars. Profiting from this huge database, we completely characterized the evolved stellar sequences of the cluster by determining a variety of photometric parameters, including new photometric estimates of the mean metallicity, reddening and distance to the cluster. In particular, from our multi-wavelength analysis, we re-examined the long-standing metallicity spread problem in M 22. According to our dataset, we conclude that most of the observed width of the red giant branch must be due to differential reddening, which amounts to a maximum of {Delta}E(B-V)~0.06, although the presence of a small metallicity spread cannot be completely ruled out. More specifically, the maximum metallicity spread allowed by our data is of the order of {Delta}[Fe/H]~0.1-0.2dex, i.e., not much more than what allowed by the photometric errors. Finally, we identified most of the known variable stars and peculiar objects in our field of view. In particular, we find additional evidence supporting previous optical identifications of the central star of the Planetary Nebula IRAS 18333-2357, which is associated with M 22.2004MNRAS.349.1278Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/349/1278CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/420/612 : Proper motions + radial velocities in M22 (Peterson+ 1994)J/A+AS/109/487 : Color-magnitude study of M 22 (Samus+, 1995)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/349/1278https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/349/1278http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/349/1278https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/349/1278https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/349/1278http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/349/1278GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/349/1278/chip1 (Photometry of stars in Chip #1)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip1?GETtext/xml+votable180.050000true279.2438378-23.86050310.005555555555555556Cone search capability for table J/MNRAS/349/1278/chip2 (*Photometry of stars in Chip #2)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip2?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip2?GETtext/xml+votable180.050000true279.1163595-23.92031870.005555555555555556Cone search capability for table J/MNRAS/349/1278/chip3 (Photometry of stars in Chip #3)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip3?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip3?GETtext/xml+votable180.050000true278.969885-23.89274070.005555555555555556Cone search capability for table J/MNRAS/349/1278/chip6 (Photometry of stars in Chip #6)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip6?GETtext/xml+votable180.050000true278.9439419-24.29655780.005555555555555556Cone search capability for table J/MNRAS/349/1278/chip7 (Photometry of stars in Chip #7)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip7?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip7?GETtext/xml+votable180.050000true279.0420272-24.09693780.005555555555555556Cone search capability for table J/MNRAS/349/1278/chip8 (Photometry of stars in Chip #8)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/349/1278/chip8?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/349/1278/chip8?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/349/1278/chip8?GETtext/xml+votable180.050000true279.2652753-24.28113350.0055555555555555566/28966-28967 28972-28973https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/349/1278?format=asciiOpticaldefaultJ/MNRAS/349/1278/chip1Photometry of stars in Chip #1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.mainintBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.mainJ/MNRAS/349/1278/chip2*Photometry of stars in Chip #2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.mainintBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainindexedDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.mainindexedJ/MNRAS/349/1278/chip3Photometry of stars in Chip #3recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.mainintBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.mainJ/MNRAS/349/1278/chip6Photometry of stars in Chip #6BmagB-band magnitudemagphot.mag;em.opt.BfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.maininte_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.mainJ/MNRAS/349/1278/chip7Photometry of stars in Chip #7recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.mainintBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.mainJ/MNRAS/349/1278/chip8Photometry of stars in Chip #8recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMPFStar Sequencial Identifier, Cl* NGC 6656 MPF NNNN in Simbadmeta.id;meta.mainintBmagB-band magnitudemagphot.mag;em.opt.Bfloate_BmagFormal DAOPHOT errors associated to the B-band magnitudemagstat.errorfloatVmagV-band magnitudemagphot.mag;em.opt.Vfloate_VmagFormal DAOPHOT errors associated to the V-band magnitudemagstat.errorfloatImagI-band magnitudemagphot.mag;em.opt.Ifloate_ImagFormal DAOPHOT errors associated to the I-band magnitudemagstat.errorfloatxposx star coordinates in the pixel coordinate systempixpos.cartesian.x;instr.detdoubleyposy star coordinates in the pixel coordinate systempixpos.cartesian.y;instr.detdoubleRAdegRight Ascension J2000 (decimal degrees)degpos.eq.ra;meta.mainDEdegDeclination J2000 (decimal degrees)degpos.eq.dec;meta.main