J/MNRAS/428/2216ivo://CDS.VizieR/J/MNRAS/428/2216doi:10.26093/cds/vizier.74282216CDSWhitelock P.A.Menzies J.W.Feast M.W.Nsengiyumva F.Matsunaga N.2024-07-20T20:13:20Z2014-03-13T09:06:57ZCDS support team

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

cds-question@unistra.frgalaxiesphotometrygiant-starsinfrared-photometryJHKs photometry is presented from a 3.5yr survey of the central regions of the irregular galaxy NGC 6822. The morphology of the colour-magnitude and colour-colour diagrams is discussed with particular reference to M-, S- and C-type asymptotic giant branch (AGB) stars and to M supergiants. Mean JHKs magnitudes and periods are given for 11 O-rich and 50 presumed C-rich Miras. Data are also listed for 27 large-amplitude AGB stars without periods and for 69 small-amplitude AGB variables. The slope of the bolometric period-luminosity relation for the C-rich Miras is in good agreement with that in the Large Magellanic Cloud. Distance moduli derived from the C- and O-rich Miras are in agreement with other estimates. The period distribution of C-rich Miras in NGC 6822 is similar to that in the Magellanic Clouds, but differs from that in the dwarf spheroidals in the Local Group. In the latter there is a significant proportion of large-amplitude, short-period variables indicating a population producing old carbon-rich AGB stars.2013MNRAS.428.2216Whttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/428/2216CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/ApJ/501/153 : VRB photometry of red supergiants (Massey 1998)J/A+A/429/837 : IJKs photometry of late-type stars in NGC 6822 (Cioni+, 2005)J/AJ/132/378 : HST and UV photometry of NGC 6822 (Bianchi+, 2006)J/AJ/132/1372 : Chandra observation of NGC 6822 (Tennant+, 2006)J/A+A/454/717 : NGC 6822 near-IR photometry of C and AGB stars (Kang+, 2006)J/A+A/537/A108 : NGC 6822 AGB spectroscopic catalogue (Kacharov+, 2012)J/A+A/540/A135 : AGB population of NGC 6822 (Sibbons+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/428/2216https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/428/2216http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/428/2216https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/428/2216https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/428/2216http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/428/2216GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/428/2216/table1 (Data for stars with standard errors less than 0.1mag)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/428/2216/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/428/2216/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/428/2216/table1?GETtext/xml+votable180.050000true296.17061-14.952340.005555555555555556Cone search capability for table J/MNRAS/428/2216/tab356 (S-type stars (table3), large-amplitude (table5) and small-amplitude (table6) variables)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/428/2216/tab356?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/428/2216/tab356?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/428/2216/tab356?GETtext/xml+votable180.050000true296.17892-14.822860.005555555555555556Cone search capability for table J/MNRAS/428/2216/table4 (Miras, O-rich (table4a) and C-rich (table4b))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/428/2216/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/428/2216/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/428/2216/table4?GETtext/xml+votable180.050000true296.18398-14.780180.005555555555555556Cone search capability for table J/MNRAS/428/2216/table7 (Variables in common with the Battinelli & Demers (2011A&A...525A..69B))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/428/2216/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/428/2216/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/428/2216/table7?GETtext/xml+votable180.050000true296.1967083-14.75105560.0055555555555555566/29716 297187.952274030004205e-20 1.7798557115773645e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/428/2216?format=asciiOpticalInfrareddefaultJ/MNRAS/428/2216/table1Data for stars with standard errors less than 0.1magrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10001/40643] Catalogue Number (this paper)meta.id;meta.mainintprimaryRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainMSimbad column added by the CDSmeta.ref.urlcharJmag[12.5/20.0] Mean J magnitudemagphot.mag;em.IR.Jfloate_JmagJ standard deviationmagstat.error;phot.mag;em.IR.Jfloato_Jmag[2/36] Number of J observations averagedmeta.numberintHmag[12.0/18.5] Mean H magnitudemagphot.mag;em.IR.Hfloate_HmagH standard deviationmagstat.error;phot.mag;em.IR.Hfloato_Hmag[2/36] Number of H observations averagedmeta.numberintKsmag[11.9/18.3] Mean Ks magnitudemagphot.mag;em.IR.Kfloate_KsmagKs standard deviationmagstat.error;phot.mag;em.IR.Kfloato_Ksmag[2/36] Number of Ks observations averagedmeta.numberintJ-HJ-H colour indexmagphot.color;em.IR.J;em.IR.HfloatH-KsH-Ks colour indexmagphot.color;em.IR.H;em.IR.KfloatJ-KsJ-Ks colour indexmagphot.color;em.IR.J;em.IR.KfloatJ/MNRAS/428/2216/tab356S-type stars (table3), large-amplitude (table5) and small-amplitude (table6) variablesRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10001/40643] Catalogue Number (this paper)meta.id;meta.mainintDEJ2000Declination (J2000)degpos.eq.dec;meta.mainTSimbad column added by the CDSmeta.code;src.varcharJmagMean J magnitudemagphot.mag;em.IR.Jfloate_JmagJ standard deviationmagstat.error;phot.mag;em.IR.Jfloato_JmagNumber of J observations averagedmeta.numberintHmagMean H magnitudemagphot.mag;em.IR.Hfloate_HmagH standard deviationmagstat.error;phot.mag;em.IR.Hfloato_HmagNumber of H observations averagedmeta.numberintKsmagMean Ks magnitudemagphot.mag;em.IR.Kfloate_KsmagKs standard deviationmagstat.error;phot.mag;em.IR.Kfloato_KsmagNumber of Ks observations averagedmeta.numberintJ-KsJ-Ks colour indexmagphot.color;em.IR.J;em.IR.KfloatNote[1/2]? Possible Mira (1)meta.noteintnullableJ/MNRAS/428/2216/table4Miras, O-rich (table4a) and C-rich (table4b)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10001/40643] Catalogue Number (this paper)meta.id;meta.mainintprimaryRAJ2000Right ascension (J2000)degpos.eq.ra;meta.mainDEJ2000Declination (J2000)degpos.eq.dec;meta.mainMSimbad column added by the CDSmeta.ref.urlcharTSimbad column added by the CDSmeta.code;src.varcharPerPerioddtime.periodintJmagFourier mean J magnitudemagphot.mag;em.IR.JfloatHmagFourier mean H magnitudemagphot.mag;em.IR.HfloatKsmagFourier mean Ks magnitudemagphot.mag;em.IR.KfloatJamp? Peak-to-peak amplitude in J of the best-fitting first-order sine curvemagsrc.var.amplitude;em.IR.JfloatnullableHampPeak-to-peak amplitude in H of the best-fitting first-order sine curvemagsrc.var.amplitude;em.IR.HfloatKsampPeak-to-peak amplitude in Ks of the best-fitting first-order sine curvemagsrc.var.amplitude;em.IR.KfloatSpTypeSpectral type (1)src.spTypecharNoteNote (2)meta.notecharJ/MNRAS/428/2216/table7Variables in common with the Battinelli & Demers (2011A&A...525A..69B)PerPerioddtime.periodintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10001/40643] Catalogue Number (this paper)meta.id;meta.mainintprimaryMSimbad column added by the CDSmeta.ref.urlcharu_PerUncertainty flag on Permeta.code.errorcharKsmagKs magnitudemagphot.mag;em.IR.Kfloat[BD2011][1/20] Battinelli & Demers (2011A&A...525A..69B) numbermeta.idintPer2Period from Battinelli & Demers (2011A&A...525A..69B)dtime.periodintKsmag2Ks magnitude from Battinelli & Demers (2011A&A...525A..69B)magphot.mag;em.IR.KfloatSimbadSimbad column added by the CDSmeta.ref.urlchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/MNRAS/428/2216/table10Bolometric magnitudes of the assumed C-rich MirasrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[10001/40643] Catalogue Number (this paper)meta.id;meta.mainintPerPerioddtime.periodintmbolBolometric apparent magnitudemagphot.mag.bolfloat(J-Ks)0Deredenned J-Ks colour indexmagphot.color;em.IR.J;em.IR.Kfloat