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dc.contributor.authorGiovannini Junior, Odilonpt_BR
dc.contributor.authorKepler, Souza Oliveirapt_BR
dc.contributor.authorKanaan Neto, Antonio Nemerpt_BR
dc.contributor.authorCosta, A.F.M.pt_BR
dc.contributor.authorKoester, Detlevpt_BR
dc.date.accessioned2014-07-11T02:05:18Zpt_BR
dc.date.issued1998pt_BR
dc.identifier.issn0004-6361pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/97466pt_BR
dc.description.abstractWe report the discovery of a new long{period ZZ Ceti star through the analysis of photometric time series gathered on 7 nights between 1995 and 1996. The light curve displays a periodic variation with a period of ~ 18 min in white light and the frequency analysis reveals a low frequency peak at ~ 0.92 mHz with an amplitude varying from 0.007 to 0.025 mag present every night. BPM 24754 is the 28th known ZZ Ceti star and it has the second longest period. We have also determined its atmospheric parameters using line pro le tting and its mass using white dwarf evolutionary models. BPM 24754 has Teff = 12,900 ± 320 K, log g = 8.04 ± 0.08, and M = 0.63 ± 0.04 Mʘ. We compare its Teff in relation to the ZZ Ceti instability strip.en
dc.format.mimetypeapplication/pdf
dc.language.isoengpt_BR
dc.relation.ispartofAstronomy and Astrophysics. Berlin. Vol. 329, no. 1 (Jan. 1998), p. l13-l16pt_BR
dc.rightsOpen Accessen
dc.subjectStars: individual: BPM 24754en
dc.subjectAstrofisica estelarpt_BR
dc.subjectAnãs brancaspt_BR
dc.subjectStars: variables: otheren
dc.subjectStars: oscillationsen
dc.subjectEstrelas variaveispt_BR
dc.subjectEvolucao estelarpt_BR
dc.subjectStars: fundamental parametersen
dc.subjectOscilacoespt_BR
dc.subjectWhite dwarfsen
dc.subjectFotometriapt_BR
dc.titleBpm 24754 : a new southern zz ceti starpt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000234040pt_BR
dc.type.originEstrangeiropt_BR


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