J/AJ/127/2838ivo://CDS.VizieR/J/AJ/127/2838doi:10.26093/cds/vizier.51272838CDSDownes R.A.Margon B.Anderson S.F.Harris H.C.Knapp G.R.,Schroeder J.Schneider D.P.York D.G.Pier J.R.Brinkmann J.2023-04-06T16:51:04Z2005-12-01T11:30:08ZCDS support team

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

cds-question@unistra.frcarbon-starsvisible-astronomysloan-photometryinfrared-photometryA search of more than 3000deg^2^ of high-latitude sky by the Sloan Digital Sky Survey has yielded 251 faint high-latitude carbon stars (FHLCs), the large majority previously uncatalogued. We present homogeneous spectroscopy, photometry, and astrometry for the sample. The objects lie in the 15.6<r<20.8 range and exhibit a wide variety of apparent photospheric temperatures, ranging from spectral types near M to as early as F. Proper-motion measurements for 222 of the objects show that at least 50%, and quite probably more than 60%, of these objects are actually low-luminosity dwarf carbon (dC) stars, in agreement with a variety of recent, more limited investigations that show that such objects are the numerically dominant type of star with C_2_ in the spectrum. This SDSS homogeneous sample of ~110 dC stars now constitutes 90% of all known carbon dwarfs and will grow by another factor of 2-3 by the completion of the survey. As the spectra of the dC and the faint halo giant C stars are very similar (at least at spectral resolution of 10^3^), despite a difference of 10mag in luminosity, it is imperative that simple luminosity discriminants other than proper motion be developed. We use our enlarged sample of FHLCs to examine a variety of possible luminosity criteria, including many previously suggested, and find that, with certain important caveats, JHK photometry may segregate dwarfs and giants.2004AJ....127.2838Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/127/2838CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-tohttp://www.sdss.org : the SDSS Catalog Home PageJ/AJ/126/2579 : SDSS quasar catalog. II. First data release (Schneider+, 2003)J/AJ/124/1651 : Faint high-latitude carbon stars SDSS photometry (Margon+ 2002)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/127/2838https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/127/2838http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/127/2838https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/127/2838https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/127/2838http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/127/2838GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/127/2838/table1 (Faint High-Latitude Carbon Stars Discovered in SDSS)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/127/2838/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/127/2838/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/127/2838/table1?GETtext/xml+votable180.050000true0.9759583-10.69950.0055555555555555566/545 4098 4113 4115 5114 5591 5758-5759 5809 5841 5846 5859 5880 5917 5957 5959 5962 5965 5998 6048 6070 6072 6084 6133-6134 6163 6167 6197 6220 6228 6233 6391 6407 6439 6446 6516 6539-6540 6546 6558 6608 6612 7169 7196 7257 7266 7441 7453 7456 7473 7506 7520 8198 8206 8224 8227 8233 9343 9475 9507 9607 9610 9624 9633 9636 9834 9905 9910 9916 9944 9979-9980 10017 10099 10183 10200 10234 10990 11133 11172 11219 11221 11227 11229 11242 11341 11344 11457 11464 11473 11480 11493 11496 11506 11530 11805 11817 11881 11906 11913-11914 12550 17149 17213 17230 17471 17507 17565 17573 17579 17584 17767 17807 17815 17829 17834 17983 18001 18004-18006 18013 18072 18077 18081 18083 18176 18517 18523 18540 18587 18798 18844 18858 18948 18976 19036 19038 19041 19048 19089 19100 19137 19399 19410 19671 19691 19700 19748 19751 20005 21852 23052 23190 23193 23214 25587 25589 25846 25909 25918 25927 25937 25943-25944 25951 25960 25973 25999-26000 26015 26038 26047 26051 26060 26063-26064 26068 26080 26191 26199 26254 26276 26285 26308 26315 26318-26319 26336 26343 26352 26368 26380 26389 26400 26407 26412 26432 26498 26956 26961 26972 26983 26988-26989 26993 27057 27063 27091 27100 27102 27246 27249-27251 27256 27261 27292 27313 27342 27362 27395 27663 27689-27690 27693 31314 31374 31383 31389 31436 31488 32508 32510 32680 36802 40959 450462.85864675833786e-19 3.5010283109654867e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/127/2838?format=asciiOpticalInfrareddefaultJ/AJ/127/2838/table1Faint High-Latitude Carbon Stars Discovered in SDSSH-K? The (H-K) colormagfloatnullablef_rmag[gh] Flag on rmag (4)charrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSDSSSDSS name (1)charEpoch? Epoch of the observation (2)floatnullablermagSDSS r-band magnitude (3)magfloatu-g? SDSS (u-g) colormagfloatnullableg-r? SDSS (g-r) colormagfloatnullabler-i? SDSS (r-i) colormagfloatnullablei-z? SDSS (i-z) colormagfloatnullableJ-H? The (J-H) colormagfloatnullabler-J? The (r-J) colormagfloatnullablemu? Proper motionmas/yrfloatnullablee_mu? The 1 {sigma} error in mumas/yrfloatnullablePA? Position angledegfloatnullableClassObject class (5)charf_Class? Flag on Class (6)intnullable_RARight ascension (derived from SDSS) for Eq=J2000.0degpos.eq.ra;meta.main_DEDeclination (derived from SDSS) for Eq=J2000.0degpos.eq.dec;meta.main