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SDSS DR7 white dwarf catalog

dc.contributor.authorKleinman, Scot Jamespt_BR
dc.contributor.authorKepler, Souza Oliveirapt_BR
dc.contributor.authorKoester, Detlevpt_BR
dc.contributor.authorPelisoli, Ingrid Domingospt_BR
dc.contributor.authorAntonio, Viviane Peçanhapt_BR
dc.contributor.authorNitta, Atsukopt_BR
dc.contributor.authorCosta, Jose Eduardo da Silveirapt_BR
dc.contributor.authorKrzesinski, Jerzypt_BR
dc.contributor.authorDufour, Patrickpt_BR
dc.contributor.authorLachapelle, François-Renépt_BR
dc.contributor.authorBergeron, Pierrept_BR
dc.contributor.authorYip, Ching-Wapt_BR
dc.contributor.authorHarris, Hugh C.pt_BR
dc.contributor.authorEisenstein, Daniel, J.pt_BR
dc.contributor.authorAlthaus, Leandro Gabrielpt_BR
dc.contributor.authorCórsico, Alejandro Hugopt_BR
dc.date.accessioned2015-01-20T02:15:22Zpt_BR
dc.date.issued2013pt_BR
dc.identifier.issn0067-0049pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/109068pt_BR
dc.description.abstractWe present a new catalog of spectroscopically confirmed white dwarf stars from the Sloan Digital Sky Survey (SDSS) Data Release 7 spectroscopic catalog. We find 20,407 white dwarf spectra, representing 19,712 stars, and provide atmospheric model fits to 14,120 DA and 1011 DB white dwarf spectra from 12,843 and 923 stars, respectively. These numbers represent more than a factor of two increase in the total number of white dwarf stars from the previous SDSS white dwarf catalogs based on DR4 data. Our distribution of subtypes varies from previous catalogs due to our more conservative, manual classifications of each star in our catalog, supplementing our automatic fits. In particular, we find a large number of magnetic white dwarf stars whose small Zeeman splittings mimic increased Stark broadening that would otherwise result in an overestimated log g if fit as a non-magnetic white dwarf. We calculate mean DA and DB masses for our clean, non-magnetic sample and find the DB mean mass is statistically larger than that for the DAs.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofThe astrophysical journal. Supplement series. Chicago. Vol. 204, no. 1 (Jan. 2013), 5, 14 p.pt_BR
dc.rightsOpen Accessen
dc.subjectAlargamento de linha espectralpt_BR
dc.subjectCatalogsen
dc.subjectMagnetic fieldsen
dc.subjectCatalogos astronomicospt_BR
dc.subjectAnãs brancaspt_BR
dc.subjectStars: luminosity function, mass functionen
dc.subjectEfeito starkpt_BR
dc.subjectSurveysen
dc.subjectWhite dwarfsen
dc.subjectEfeito Zeemanpt_BR
dc.subjectAtmosferas estelarespt_BR
dc.subjectModelos estelarespt_BR
dc.subjectMagnetismo estelarpt_BR
dc.titleSDSS DR7 white dwarf catalogpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000900709pt_BR
dc.type.originEstrangeiropt_BR


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