J/A+A/436/91ivo://CDS.VizieR/J/A+A/436/91doi:10.26093/cds/vizier.34360091CDSDemers S.Battinelli P.2005-06-02T04:39:45Z2005-06-02T04:39:36ZCDS support team

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

cds-question@unistra.frcarbon-starsccd-photometryvisible-astronomysloan-photometryWe employ the CFHT Megacam camera to survey ~1{deg}^2^ of the southern outer disc of M31, a region which includes the area where Battinelli et al. (2003, Cat. <J/AJ/125/1298>) have identified nearly one thousand C stars. In the outer M31 region not previously surveyed, we identify 361 new C star candidates, having similar photometric properties to the known ones, and confirm the slight decrease in the luminosity of C stars with galactocentric distances. We show that the Sloan g', r', i' filters are a viable approach, comparable to (CN-TiO), to identify C stars. We find that the (g'-r') colours of cool C stars can be so red that prohibitively long g' exposures are needed to acquire faint extragalactic C stars. This makes the Sloan filters a less promising approach to extend a C star survey to several Mpc. Our uniform large field survey detects the edge of M31 disk at ~35kpc. The intermediate-age population, represented by C stars, extends further to ~40kpc.2005A&A...436...91Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/436/91CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/125/1298 : C star population in outer disk of M31 (Battinelli+, 2003)J/AJ/125/3037 : RI photometry of NGC 205 carbon stars (Demers+, 2003)J/A+A/424/125 : Carbon stars in IC10 (Demers+, 2004)J/A+AS/97/603 : C stars in SMC (Rebeirot+ 1993)J/A+A/416/111 : C stars in Wolf-Lundmark-Melotte galaxy (Battinelli+, 2004)J/A+A/417/479 : RI photometry of NGC 185 carbon stars (Battinelli+, 2004)J/A+A/410/795 : Photometry of NGC 3109 carbon stars (Demers+, 2003)J/AJ/125/3037 : RI photometry of NGC 205 carbon stars (Demers+, 2003)J/AJ/120/1801 : C stars in Pegasus, DDO 210 and Tucana (Battinelli+, 2000)J/AJ/119/2780 : C stars in IC 1613 (Albert+, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/436/91https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/436/91http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/436/91https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/436/91https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/436/91http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/436/91GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/436/91/table2 (Positions and photometry of 463 C stars)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/436/91/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/436/91/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/436/91/table2?GETtext/xml+votable180.050000true8.621931139.63227460.0055555555555555566/2618-2619 2704-2705https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/436/91?format=asciiOpticaldefaultJ/A+A/436/91/table2Positions and photometry of 463 C starsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqRunning numberintRAJ2000Right ascension (J2000.0)degpos.eq.ra;meta.mainDEJ2000Declination (J2000.0)degpos.eq.dec;meta.maini'magSDSS i' magnitudefloate_i'magError on i'magfloat(r'-i')SDSS (r'-i') colour indexfloate_(r'-i')Error on (r'-i')float(g'-r')SDSS (g'-r') colour indexfloate_(g'-r')Error on g'-r'float