J/ApJS/228/19ivo://CDS.VizieR/J/ApJS/228/19doi:10.26093/cds/vizier.22280019CDSCarbon D.F.Henze C.Nelson B.C.2019-12-17T10:58:29Z2017-09-06T08:42:39ZCDS support team

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

cds-question@unistra.frchemically-peculiar-starsvisible-astronomysloan-photometryspectroscopystellar-spectral-typescarbon-starsWe present the results of a search for extremely metal-poor (EMP), carbon-enhanced metal-poor (CEMP), and cataclysmic variable (CV) stars using a new exploration tool based on linked scatter plots (LSPs). Our approach is especially designed to work with very large spectrum data sets such as the SDSS, LAMOST, RAVE, and Gaia data sets, and it can be applied to stellar, galaxy, and quasar spectra. As a demonstration, we conduct our search using the SDSS DR10 data set. We first created a 3326-dimensional phase space containing nearly 2 billion measures of the strengths of over 1600 spectral features in 569738 SDSS stars. These measures capture essentially all the stellar atomic and molecular species visible at the resolution of SDSS spectra. We show how LSPs can be used to quickly isolate and examine interesting portions of this phase space. To illustrate, we use LSPs coupled with cuts in selected portions of phase space to extract EMP stars, CEMP stars, and CV stars. We present identifications for 59 previously unrecognized candidate EMP stars and 11 previously unrecognized candidate CEMP stars. We also call attention to 2 candidate He II emission CV stars found by the LSP approach that have not yet been discussed in the literature.2017ApJS..228...19Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/228/19CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)J/ApJS/94/687 : Old stellar populations. V. (Worthey+, 1994)J/ApJS/111/377 : H{gamma} & H{delta} absorption features (Worthey+ 1997)J/ApJS/116/1 : Old Stellar Populations. VI. Absorption-Line (Trager+ 1998)J/AJ/117/2308 : Spectroscopy of hot stars in the halo (Wilhelm+, 1999)J/AJ/125/1598 : New high PM stars in the northern sky (Lepine+, 2003)J/AJ/134/185 : Cataclysmic variables from SDSS-DR5 (Szkody+, 2007)J/AJ/134/2398 : Stellar SEDs in SDSS and 2MASS filters (Covey+, 2007)J/ApJ/725/L186 : Orbital eccentricities of 31535 G-dwarfs (Dierickx+, 2010)J/MNRAS/402/620 : SDSS WD main-sequence binaries (Rebassa-Mansergas+, 2010)J/MNRAS/402/436 : New Dwarf novae in SDSS, GALEX and astrom. cat. (Wils+, 2010)J/AJ/142/193 : RAVE stellar elemental abundances (DR1) (Boeche+, 2011)J/AJ/142/181 : CVs from SDSS. VIII. The final year (Szkody+, 2011)J/MNRAS/421/2414 : Faint cataclysmic variables from SDSS (Woudt+, 2012)J/AJ/145/13 : Metal-poor stars from SDSS/SEGUE. I. Abundances (Aoki+, 2013)J/A+A/579/A28 : Abundances of 3 CEMP stars (Bonifacio+, 2015)J/A+A/593/A28 : Halo metal-poor stars chemical data (Fernandez-Alvar+, 2016)http://www.sdss3.org/ : SDSS-III home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/228/19https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/228/19http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/228/19https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/228/19https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/228/19http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/228/19GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJS/228/19/stars (Candidate extremely metal-poor (EMP); uncertain EMP or CEMP candidates and cataclysmic variable (CV) stars (tables 1, 2 and 3))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/228/19/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/228/19/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/228/19/stars?GETtext/xml+votable180.050000true1.00515.79933330.0055555555555555566/2060 4598 4653 5252 5561 5669 5908 6104 6216 6252 6261 6586 6599 6616 7393 7513 7788 8170 8264 8629 8670 8689 8818 8843 9862 9937 10235 10294 10315 10431 10565 10660 10690 10775 10828 10965 10994 11140 15893 17836 18053 18335 18891 19366 19367 19501 19697 21996 22390 22830 25290 25333 25926 25938 25940 26202 26277 26282 26476 26478 26539 26540 27192 27984 28014 28573 31438 31445 368453.588997330618193e-19 4.653515163505597e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/228/19?format=asciiOpticaldefaultJ/ApJS/228/19/starsCandidate extremely metal-poor (EMP); uncertain EMP or CEMP candidates and cataclysmic variable (CV) stars (tables 1, 2 and 3)SpInteractive spectrum from SDSSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintClsrc.classcharSDSSStar name (JHHMMSS.ss+DDMMSS.s)meta.id;meta.maincharPlateSDSS platemeta.noteintFiberSDSS fibermeta.noteintMJDSDSS MJDdtime.epochintgmag[14.9/21] SDSS g-band magnitudemagphot.mag;em.opt.Bfloatu-g[0.05/1] u-g color indexmagphot.color;em.opt.U;em.opt.Bfloatg-r[-0.1/0.4] g-r color indexmagphot.color;em.opt.B;em.opt.RfloatSCaIIK[0.1/0.4]? S(Ca II K) value (1)phot.flux;arith.ratiofloatnullableDCaIIK[3.2/27.2]? D(Ca II K) value (2)phot.flux;arith.ratiofloatnullableSH[0.4/0.7]? S(H_{epsilon}_) value (1)phot.flux;arith.ratiofloatnullableDH[16.2/60.2]? D(H_{epsilon}_) value (2)phot.flux;arith.ratiofloatnullableSCH[0.01/0.3]? S(CH 4308) value (1)phot.flux;arith.ratiofloatnullableDCH[0.2/14.7]? D(CH 4308) value (2)phot.flux;arith.ratiofloatnullableSpTMK spectral type ("CV" for cataclysmic variable)src.spTypecharNotesNotesmeta.notecharf_NotesFlag on Notes (3)meta.notecharSimbadSimbad column added by the CDSmeta.ref.urlchar_RAPositions from SDSS names (right ascension part)degpos.eq.ra;meta.main_DEPositions from SDSS names (declination part)degpos.eq.dec;meta.main