SDSS white dwarfs with spectra showing atomic oxygen and/or carbon lines

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dc.contributor.authorLiebert, J
dc.contributor.authorHarris, HC
dc.contributor.authorDahn, CC
dc.contributor.authorSchmidt, GD
dc.contributor.authorKleinman, SJ
dc.contributor.authorNitta, A
dc.contributor.authorKrzesinski, J
dc.contributor.authorEisenstein, D
dc.contributor.authorSmith, JA
dc.contributor.authorSzkody, P
dc.contributor.authorHawley, S
dc.contributor.authorAnderson, SF
dc.contributor.authorBrinkmann, J
dc.contributor.authorCollinge, MJ
dc.contributor.authorFan, XH
dc.contributor.authorHall, PB
dc.contributor.authorKnapp, GR
dc.contributor.authorLamb, DQ
dc.contributor.authorMargon, B
dc.contributor.authorSchneider, DP
dc.contributor.authorSilvestri, N
dc.date.accessioned2025-01-21T01:08:45Z
dc.date.available2025-01-21T01:08:45Z
dc.date.issued2003
dc.description.abstractWe discuss 18 white dwarfs, one of which (G227-5) was previously known, whose SDSS spectra show lines of neutral and/or singly ionized carbon. At least two and perhaps four show lines of neutral or singly ionized oxygen. Apart from the extremely hot "PG 1159'' stars, these are the first white dwarfs with photospheric oxygen detected in their optical spectra. The photometry strongly suggests that these stars lie in the 11,000-30,000 K temperature range of the helium-atmosphere DB white dwarfs, though only one of them shows weak neutral helium lines in the spectrum. Trigonometric parallaxes are known for G227-5 and another, previously known white dwarf (G35-26) showing atomic carbon lines, and they indicate that both are massive stars. Theoretical arguments suggest that all members of this class of rare white dwarfs are massive (similar to1 M.), and this finding could explain the paucity of massive DB white dwarfs.
dc.fuente.origenWOS
dc.identifier.issn0004-6256
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/96506
dc.identifier.wosidWOS:000186494200033
dc.issue.numero5
dc.language.isoen
dc.pagina.final2528
dc.pagina.inicio2521
dc.revistaAstronomical journal
dc.rightsacceso restringido
dc.subjectstars : abundances
dc.subjectstars : atmospheres
dc.subjectwhite dwarfs
dc.titleSDSS white dwarfs with spectra showing atomic oxygen and/or carbon lines
dc.typeartículo
dc.volumen126
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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