An initial survey of white dwarfs in the Sloan Digital Sky Survey

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dc.contributor.authorHarris, HC
dc.contributor.authorLiebert, J
dc.contributor.authorKleinman, SJ
dc.contributor.authorNitta, A
dc.contributor.authorAnderson, SF
dc.contributor.authorKnapp, GR
dc.contributor.authorKrzesinski, J
dc.contributor.authorSchmidt, G
dc.contributor.authorStrauss, MA
dc.contributor.authorBerk, DV
dc.contributor.authorEisenstein, D
dc.contributor.authorHawley, S
dc.contributor.authorMargon, B
dc.contributor.authorMunn, JA
dc.contributor.authorSilvestri, NM
dc.contributor.authorSmith, JA
dc.contributor.authorSzkody, P
dc.contributor.authorCollinge, MJ
dc.contributor.authorDahn, CC
dc.contributor.authorFan, XH
dc.contributor.authorHall, PB
dc.contributor.authorSchneider, DP
dc.contributor.authorBrinkmann, J
dc.contributor.authorBurles, S
dc.contributor.authorGunn, JE
dc.contributor.authorHennessy, GS
dc.contributor.authorHindsley, R
dc.contributor.authorIvezic, Z
dc.contributor.authorKent, S
dc.contributor.authorLamb, DQ
dc.contributor.authorLupton, RH
dc.contributor.authorNichol, RC
dc.contributor.authorPier, JR
dc.contributor.authorSchlegel, DJ
dc.contributor.authorSubbaRao, M
dc.contributor.authorUomoto, A
dc.contributor.authorYanny, B
dc.contributor.authorYork, DG
dc.date.accessioned2025-01-21T01:09:09Z
dc.date.available2025-01-21T01:09:09Z
dc.date.issued2003
dc.description.abstractAn initial assessment is made of white dwarf and hot subdwarf stars observed in the Sloan Digital Sky Survey. In a small area of sky ( 190 square degrees), observed much like the full survey will be, 269 white dwarfs (WDs) and 56 hot subdwarfs are identified spectroscopically where only 44 white dwarfs and five hot subdwarfs were known previously. Most are ordinary DA ( hydrogen atmosphere) and DB ( helium) types. In addition, in the full survey to date, a number of WDs have been found with uncommon spectral types. Among these are blue DQ stars displaying lines of atomic carbon; red DQ stars showing molecular bands of C-2 with a wide variety of strengths; DZ stars where Ca and occasionally Mg, Na, and/or Fe lines are detected; and magnetic WDs with a wide range of magnetic field strengths in DA, DB, DQ, and ( probably) DZ spectral types. Photometry alone allows identification of stars hotter than 12,000 K, and the density of these stars for 15 < g < 20 is found to be similar to2.2 deg(-2) at Galactic latitudes of 29degrees - 62degrees. Spectra are obtained for roughly half of these hot stars. The spectra show that for 15 < g < 17, 40% of hot stars are WDs, and the fraction of WDs rises to similar to90% at g = 20. The remainder are hot sdB and sdO stars.
dc.fuente.origenWOS
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96551
dc.identifier.wosidWOS:000184446600034
dc.issue.numero2
dc.language.isoen
dc.pagina.final1040
dc.pagina.inicio1023
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectstars : chemically peculiar
dc.subjectstars : magnetic fields
dc.subjectsurveys
dc.subjectwhite dwarfs
dc.titleAn initial survey of white dwarfs in the Sloan Digital Sky Survey
dc.typeartículo
dc.volumen126
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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