J/MNRAS/447/3973ivo://CDS.VizieR/J/MNRAS/447/3973doi:10.26093/cds/vizier/bg-dz-3w5CDSJavadi A.Saberi M.Van Loon J.TH.Khosroshahi H.Golabatooni N.,Mirtorabi M.T.2026-08-03T07:29:27Z2025-09-10T09:27:46ZCDS support team

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

cds-question@unistra.frgalaxiesinfrared-photometryvariable-starsWe have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope, of the Local Group spiral galaxy M33 (Triangulum). The main aim was to identify stars in the very final stage of their evolution, and for which the luminosity is more directly related to the birth mass than the more numerous less-evolved giant stars that continue to increase in luminosity. In this fourth paper of the series, we present a search for variable red giant stars in an almost square degree region comprising most of the galaxy's disc, carried out with the WFCAM (Wide Field CAMera) instrument in the K band. These data, taken during the period 2005-2007, were complemented by J- and H-band images. Photometry was obtained for 403 734 stars in this region; of these, 4643 stars were found to be variable, most of which are asymptotic giant branch (AGB) stars. The variable stars are concentrated towards the centre of M33, more so than low-mass, less-evolved red giants. Our data were matched to optical catalogues of variable stars and carbon stars and to mid-infrared photometry from the Spitzer Space Telescope. Most dusty AGB stars had not been previously identified in optical variability surveys, and our survey is also more complete for these types of stars than the Spitzer survey.2015MNRAS.447.3973Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/447/3973CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toVII/233 : 2MASS All-Sky Extended Source Catalog (XSC) (IPAC/UMass, 2003-2006)J/AJ/121/861 : BVI photometry of central part of M33 (Macri+, 2001)J/AJ/121/2032 : Direct variables in M33A field (Mochejska+, 2001)J/AJ/122/2477 : DIRECT variables in M33B field (Mochejska+, 2001)J/ApJS/149/343 : Giant molecular clouds in M33 (Engargiola+, 2003)J/A+A/426/11 : XMM-Newton survey of M33 (Pietsch+, 2004)J/AJ/129/729 : CCD photometry of luminous stars in M33 (Rowe+, 2005)J/AJ/131/2478 : M31 and M33 UBVRI photometry (Massey+, 2006)J/AJ/132/1361 : RR Lyrae variables in M33 (Sarajedini+, 2006)J/MNRAS/370/1429 : V photometry of bright stars of M33 (Shporer+, 2006)J/MNRAS/371/1405 : Variables in M33 (Hartman+, 2006)J/A+A/458/225 : Phot. standard stars in the field of GR 290 (Viotti+, 2006)J/ApJ/652/313 : BV phot. of a detached EB in M 33 (Bonanos+, 2006)J/ApJ/664/850 : Spitzer observations of stars in M33 (McQuinn+, 2007)J/MNRAS/382/1353 : Spectral atlas of omega Cen post-MS stars (van Loon+, 2007)J/A+A/487/131 : JHKs photometry of LPVs in M33 (Cioni+, 2008)J/ApJ/705/1364 : MIR catalog of point sources in M33 (Thompson+, 2009)J/MNRAS/411/263 : Paper I - JHK variable stars in M33 (Javadi+ 2011)J/ApJ/750/97 : The yellow and red supergiants of M33 (Drout+, 2012)J/ApJ/790/48 : Variable stars in M31 & M33. II. LBVs (Humphreys+, 2014)J/AJ/154/81 : BVRI phot. of luminous stars in M31 and M33 (Martin+, 2017)J/ApJS/253/53 : PHATTER. I. 22million stars in M33 with HST (Williams+, 2021)J/AJ/165/137 : Light curve and observed properties in M33 (Ou+, 2023)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/447/3973https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/447/3973http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/447/3973https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/447/3973https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/447/3973http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/447/3973GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/447/3973/wfcam (The UKIRT/WFCAM photometric catalog)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/447/3973/wfcam?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/447/3973/wfcam?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/447/3973/wfcam?GETtext/xml+votable180.050000true0.412931110.538586110.0055555555555555566/194568.297946179207444e-20 1.6867587740958882e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/447/3973?format=asciiInfrareddefaultJ/MNRAS/447/3973/wfcamThe UKIRT/WFCAM photometric catalogrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintID[1/417719] Star numbermeta.id;meta.mainintID-J[1/276973]? Star id in Jmeta.idintnullableID-H[1/301064]? Star id in Hmeta.idintnullableID-K[1/369248]? Star id in Kmeta.idintnullableNj[0/10] Number of J-band measurementsmeta.number;obs;em.IR.JintNh[0/8] Number of H-band measurementsmeta.number;obs;em.IR.HintNk[0/24] Number of K-band measurementsmeta.number;obs;em.IR.KintRAJ2000[0.4/0.42] Right ascension (J2000)degpos.eq.ra;meta.mainindexedDEJ2000[0.5/0.55] Declination (J2000)degpos.eq.dec;meta.mainindexedJmag[9.6/22.6]? Mean UKIRT/WFCAM J-band magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[0.008/0.7]? Uncertainty in Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag[10/22.1]? Mean UKIRT/WFCAM H-band magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag[0.003/0.8]? Uncertainty in Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag[9/22]? Mean UKIRT/WFCAM K band magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[0.005/0.8]? Uncertainty in Kmagmagstat.error;phot.mag;em.IR.KfloatnullableVar-J[-53.8/130.2] Variability index, Jsrc.var.indexfloatKurt-K[0/1] Kurtosis index, Kstat.param;src.var.indexfloatVar-L[-2.4/29.4] Variability index, L (1)src.var.indexfloatWeight[0/22] Weightstat.weightfloatTWeight[7/24] Total weightstat.weightfloat