J/AJ/146/114ivo://CDS.VizieR/J/AJ/146/114doi:10.26093/cds/vizier.51460114CDSGrammer S.Humphreys R.M.2018-02-01T11:50:43Z2014-07-17T13:45:31ZCDS support team

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

cds-question@unistra.frgalaxieshst-photometryAn increasing number of non-terminal giant eruptions are being observed by modern supernova and transient surveys. But very little is known about the origin of these giant eruptions and their progenitors, many of which are presumably very massive, evolved stars. Motivated by the small number of progenitors positively associated with these giant eruptions, we have begun a survey of the evolved massive star populations in nearby galaxies. The nearby, nearly face-on, giant spiral M101 is an excellent laboratory for studying a large population of very massive stars. In this paper, we present BVI photometry obtained from archival HST/ACS Wide Field Camera images of M101. We have produced a catalog of luminous stars with photometric errors <10% for V<24.5 and 50% completeness down to V~26.5 even in regions of high stellar crowding. Using color and luminosity criteria, we have identified candidate luminous OB-type stars and blue supergiants, yellow supergiants, and red supergiants for future observation. We examine their spatial distributions across the face of M101 and find that the ratio of blue to red supergiants decreases by two orders of magnitude over the radial extent of M101 corresponding to 0.5 dex in metallicity. We discuss the resolved stellar content in the giant star-forming complexes NGC 5458, 5453, 5461, 5451, 5462, and 5449 and discuss their color-magnitude diagrams in conjunction with the spatial distribution of the stars to determine their spatio-temporal formation histories.2013AJ....146..114Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/146/114CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toB/hst : HST Archived Exposures Catalog (STScI, 2007)J/AJ/141/126 : HST photometry of NGC 5471 (Garcia-Benito+, 2011)J/ApJ/733/124 : Cepheids in M101 observed with HST (Shappee+, 2011)J/MNRAS/357/401 : An XMM-Newton view of M101 (Jenkins+, 2005)J/ApJ/508/491 : M101 Cepheids (Stetson+, 1998)J/ApJ/463/26 : VI photometry of 29 Cepheids in M101. (Kelson+ 1996)J/ApJS/73/661 : H II regions in M 101 (Hodge+ 1990)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/146/114https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/146/114http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/146/114https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/146/114https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/146/114http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/146/114GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/146/114/table2 (M101 catalog from HST observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/146/114/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/146/114/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/146/114/table2?GETtext/xml+votable180.050000true210.867666754.28281110.0055555555555555566/114343.2082799382822207e-19 4.2441532724171825e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/146/114?format=asciiOpticaldefaultJ/AJ/146/114/table2M101 catalog from HST observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintStarSource identifier (JHHMMSS.ss+DDMMSS.ss) <[GH2013b] JHHMMSS.ss+DDMMSS.ss> in Simbadmeta.id;meta.maincharFieldAdvanced Camera for Surveys (ACS) field numberobs.fieldRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainindexedDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.mainindexedVmagThe V band magnitude (F555W)magphot.mag;em.opt.Vfloate_VmagThe 1{sigma} uncertainty in Vmagmagstat.error;phot.mag;em.opt.VfloatB-VThe (B-V) color index (F435W-F555W)magphot.color;em.opt.B;em.opt.Vfloate_B-VThe 1{sigma} uncertainty in B-Vmagstat.error;phot.color;em.opt.BfloatV-IThe (V-I) color index (F555W-F814W)magphot.color;em.opt.V;em.opt.Ifloate_V-IThe 1{sigma} uncertainty in V-Imagstat.error;phot.color;em.opt.Vfloat