J/A+A/629/A3ivo://CDS.VizieR/J/A+A/629/A3doi:10.26093/cds/vizier.36290003CDSSpetsieri Z.T.Bonanos A.Z.Yang M.Kourniotis M.Hatzidimitriou D.2019-11-27T12:01:16Z2019-08-22T09:10:20ZCDS support team

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

cds-question@unistra.frgalaxiessupergiant-starsvariable-starshst-photometryStudies on the massive star population in galaxies beyond the Local Group are the key to understand the link between their numbers and modes of star formation in different environments. We present the analysis of the massive star population of the galaxies NGC1326A, NGC 1425 and NGC 4548 using archival Hubble Space Telescope Wide Field Planetary Camera 2 images in the F555W and F814W filters. Through high precision point spread function fitting photometry for all sources in the three fields we identified 7640 candidate blue supergiants, 2314 candidate yellow supergiants, and 4270 candidate red supergiants. We provide an estimation the ratio of blue to red supergiants for each field as a function of galactocentric radius. Using Modules for Experiments in Stellar Astrophysics (MESA) at solar metallicity, we defined the luminosity function and estimated the star formation history of each galaxy. We carried out a variability search in the V and I filters using three variability indexes: the median absolute deviation, the interquartile range, and the inverse von-Neumann ratio. This analysis yielded 243 new variable candidates with absolute magnitudes ranging from M_V_=-4 to -10mag. We classified the variable stars based on their absolute magnitude and their position on the color-magnitude diagram using the MESA evolutionary tracks at solar metallicity. Our analysis yielded 8 candidate variable blue supergiants, 12 candidate variable yellow supergiants, 21 candidate variable red supergiants, and 4 candidate periodic variables.2019A&A...629A...3Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/629/A3CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/629/A3https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/629/A3http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/629/A3https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/629/A3https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/629/A3http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/629/A3GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/629/A3/table3 (Catalog of 5790 stars in NGC 4548)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table3?GETtext/xml+votable180.050000true188.8810666714.467897220.005555555555555556Cone search capability for table J/A+A/629/A3/table1 (Catalog of 5897 stars in NGC 1326A)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table1?GETtext/xml+votable180.050000true51.26335417-36.365838890.005555555555555556Cone search capability for table J/A+A/629/A3/table2 (Catalog of 5232 stars in NGC 1425)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table2?GETtext/xml+votable180.050000true55.564725-29.914333330.005555555555555556Cone search capability for table J/A+A/629/A3/table6 (Properties of the variable candidates in NGC 1326A ordered by average magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table6?GETtext/xml+votable180.050000true51.25389167-36.368063890.005555555555555556Cone search capability for table J/A+A/629/A3/table7 (Properties of the variable candidates in NGC 1425 ordered by average magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table7?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table7?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table7?GETtext/xml+votable180.050000true55.564725-29.914333330.005555555555555556Cone search capability for table J/A+A/629/A3/table9 (Properties of the variable candidates in NGC 4548 ordered by average magnitudes)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/629/A3/table9?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/629/A3/table9?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/629/A3/table9?GETtext/xml+votable180.050000true188.8790916714.470836110.0055555555555555566/27942 34495 359252.0401237512456292e-19 4.2441532724171825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/629/A3?format=asciidefaultJ/A+A/629/A3/table3Catalog of 5790 stars in NGC 4548recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharIDSequential numbermeta.recordintChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.IfloatJ/A+A/629/A3/table1Catalog of 5897 stars in NGC 1326ArecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharIDSequential numbermeta.recordintChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.IfloatJ/A+A/629/A3/table2Catalog of 5232 stars in NGC 1425recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharIDSequential numbermeta.recordintChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.IfloatJ/A+A/629/A3/table6Properties of the variable candidates in NGC 1326A ordered by average magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharVIDVariable Sequential number, VNNNmeta.recordcharChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.IfloatJ/A+A/629/A3/table7Properties of the variable candidates in NGC 1425 ordered by average magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharVIDVariable Sequential number, VNNNmeta.recordcharChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.IfloatJ/A+A/629/A3/table9Properties of the variable candidates in NGC 4548 ordered by average magnitudesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClusterCluster namemeta.id.parentcharVIDVariable Sequential number, VNNNmeta.recordcharChip[0/4]? Chip number (G1)meta.id;instrintnullableRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainXposX positionpixpos.cartesian.x;instr.detfloatYposY positionpixpos.cartesian.y;instr.detfloatVmagV mean magnitudemagphot.mag;em.opt.Vfloate_VmagMean V magnitude errormagstat.error;phot.mag;em.opt.VfloatImagI mean magnitudemagphot.mag;em.opt.Ifloate_ImagMean I magnitude errormagstat.error;phot.mag;em.opt.Ifloat