J/A+A/688/A180ivo://CDS.VizieR/J/A+A/688/A180doi:10.26093/cds/vizier.36880180CDSScalco M.Bedin L.Vesperini E.2024-11-29T20:04:46Z2024-08-23T08:58:11ZCDS support team

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

cds-question@unistra.frglobular-star-clustershst-photometryproper-motionsIn this paper we present the analysis of Hubble Space Telescope (HST) observations of the globular cluster Omega Centauri. Our analysis combines data obtained in this work with previously published HST data from an earlier article of this series and {encompasses} a broad portion of the cluster's radial extension. Our findings reveal a significant radial variation in the fraction of stars within the two largest stellar populations, showing that one of the main second-population groups (referred to as the blue main sequence (bMS) group) is more centrally concentrated than the first-population group (referred to as the red main sequence (rMS) group). Additionally, we explore the spatial variations of the other, smaller stellar populations (referred to as MSa and MSd) and find a qualitatively similar, but weaker, radial decrease in the fraction of stars in these populations at larger distances from the cluster centre. Only one of the populations identified (MSe) does not show any significant radial variation.2024A&A...688A.180Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/688/A180CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/853/86 : HST large programme on {omega} Centauri. II. (Bellini+, 2018)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/688/A180https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/688/A180http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/688/A180https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/688/A180https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/688/A180http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/688/A180GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/688/A180/astrom (Astrometric file)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/688/A180/astrom?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/688/A180/astrom?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/688/A180/astrom?GETtext/xml+votable180.050000true201.43216033644-47.696778232570.0055555555555555566/43225 43227https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/688/A180?format=asciidefaultJ/A+A/688/A180/table1List of HST WFC3 observations of fields F4 and F5DateObservation datetime.epoch;obscharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharPIDProgram IDmeta.id;meta.mainintPPIProgram PImeta.id;obscharInstInstrumentmeta.id;instrcharFiltFilter (F275W, F336W, F438W, F606W, F814W)meta.id;instr.filtercharExpExposuresstime.expocharJ/A+A/688/A180/tablea1Distribution of stars among various populations in the analysed fieldsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPopPopulationsrc.classcharNSTcNumber of stars for the central fieldmeta.numberintFrc? Fraction of stars for the central field%meta.numberfloatnullablee_Frc? Fraction of stars error for the central field%stat.errorfloatnullableFrcs? Fraction of stars obtained solely from the counts of classified stars, for the central field%meta.numberfloatnullablee_Frcs? Fraction of stars error obtained solely from the counts of classified stars, for the central field%stat.errorfloatnullableFr3? Fraction of stars for the field F3%meta.numberfloatnullablee_Fr3? Fraction of stars error for the field F3%stat.errorfloatnullableFr3s? Fraction of stars obtained solely from the counts of classified stars, for the field F3%meta.numberfloatnullablee_Fr3s? Fraction of stars error obtained solely from the counts of classified stars, for the field F3%stat.errorfloatnullableNST1? Number of stars for the field F1meta.numberintnullableFr1? Fraction of stars for the field F1%meta.numberfloatnullableFr5? Fraction of stars for the field F5%meta.numberfloatnullablee_Fr5? Fraction of stars error for the field F5%stat.errorfloatnullableFr5s? Fraction of stars obtained solely from the counts of classified stars, for the field F5%meta.numberfloatnullablee_Fr5s? Fraction of stars error obtained solely from the counts of classified stars, for the field F5%stat.errorfloatnullableNST4? Number of stars for the field F4meta.numberintnullableFr4? Fraction of stars for the field F4%meta.numberfloatnullablee_Fr4? Fraction of stars error for the field F4%stat.errorfloatnullableFr4s? Fraction of stars obtained solely from the counts of classified stars, for the field F4%meta.numberfloatnullablee_Fr4s? Fraction of stars error obtained solely from the counts of classified stars, for the field F4%stat.errorfloatnullableNST2? Number of stars for the field F2meta.numberintnullableFr2? Fraction of stars for the field F2%meta.numberfloatnullablee_Fr2? Fraction of stars error for the field F2%stat.errorfloatnullableFr2s? Fraction of stars obtained solely from the counts of classified stars, for the field F2%meta.numberfloatnullablee_Fr2s? Fraction of stars error obtained solely from the counts of classified stars, for the field F2%stat.errorfloatnullableNST3? Number of stars for the field F3meta.numberintnullablee_Fr1? Fraction of stars error for the field F1%stat.errorfloatnullableFr1s? Fraction of stars obtained solely from the counts of classified stars, for the field F1%meta.numberfloatnullablee_Fr1s? Fraction of stars error obtained solely from the counts of classified stars, for the field F1%stat.errorfloatnullableNST5? Number of stars for the field F5meta.numberintnullableJ/A+A/688/A180/astromAstrometric fileFieldField identifiermeta.id;obs.fieldcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDStar internal identifiermeta.id;meta.mainintXposX pixel coordinate; 0.04"/pixpixpos.cartesian.xdoubleYposY pixel coordinate; 0.04"/pixpixpos.cartesian.ydoubleRA_ICRSRight Ascension (ICRS) at Ep=2016.0degpos.eq.ra;meta.mainindexedDE_ICRSDeclination (ICRS) at Ep=2016.0degpos.eq.dec;meta.mainindexedPmembMembership probability%statdoubleJ/A+A/688/A180/method1Method-one photometric filerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintFiltFilter (F110W, F160W, F275W, F336W, F438W, F606W, F814W)meta.id;instr.filtercharExpExposure (LONG or SHORT, only for WFC3/IR)time.expocharmag? Vega magnitude in Filter (1)magphot.magdoublenullablerms? Magnitude in Filter RMS (2)instr.det.noisedoublenullableQFIT? QFIT value (3)meta.codefloatnullableO? O value (3)meta.codedoublenullableRADXS? RADXS value (3)meta.codenullableNfNumber of single exposures star is foundmeta.numberintNgNumber of good measurementsmeta.numberintSkyLocal sky valueeinstr.skyLevel;obs.field;pos.lgfloatrSkyLocal RMS of the skyeinstr.skyLevelfloatSat? Saturation flag (4)meta.codeintnullableJ/A+A/688/A180/method2Method-two photometric fileNgNumber of good measurementsmeta.numberintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintFiltFilter (F110W, F160W, F275W, F336W, F438W, F606W, F814W)meta.id;instr.filtercharExpExposure (LONG or SHORT, only for WFC3/IR)time.expocharmag? Vega magnitude in filter (1)magphot.magdoublenullablerms? Magnitude in filter RMS (2)instr.det.noisedoublenullableO? O value (3)meta.codedoublenullableRADXS? RADXS value (3)meta.codenullableNfNumber of single exposures star is foundmeta.numberintQFIT? QFIT value (3)meta.codefloatnullableJ/A+A/688/A180/method3Method-three photometric filerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintFiltFilter (F110W, F160W, F275W, F336W, F438W, F606W, F814W)meta.id;instr.filtercharExpExposure (LONG or SHORT, only for WFC3/IR)time.expocharmag? Vega magnitude in Filter (1)magphot.magdoublenullablerms? Magnitude in Filter RMS (2)instr.det.noisedoublenullableQFIT? QFIT value (3)meta.codefloatnullableO? O value (3)meta.codedoublenullableRADXS? RADXS value (3)meta.codenullableNfNumber of single exposures star is foundmeta.numberintNgNumber of good measurementsmeta.numberintJ/A+A/688/A180/gaia_idGaia identification number for sources in commonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintGaiaDR3? Gaia DR3 internal identification numbermeta.idnullableJ/A+A/688/A180/b18Bellini et al. (2018ApJ...853...86B, Cat. J/ApJ/853/86) identification number for sources in commonrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintB18? Bellini et al. (2018ApJ...853...86B, Cat. J/ApJ/853/86) internal identification numbermeta.idintnullableJ/A+A/688/A180/pop_idPopulation identifierrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintFieldField identifiermeta.id;obs.fieldcharIDStar internal identifiermeta.id;meta.mainintPopPopulation identifier (1)src.classintsPopSub-population identifier (2)src.classint