New pulsating db white dwarf stars from the Sloan Digital Sky Survey
dc.contributor.author | Nitta, Atsuko | pt_BR |
dc.contributor.author | Kleinman, Scot James | pt_BR |
dc.contributor.author | Krzesinski, Jerzy | pt_BR |
dc.contributor.author | Kepler, Souza Oliveira | pt_BR |
dc.contributor.author | Metcalfe, Travis S. | pt_BR |
dc.contributor.author | Mukadam, Anjum Shagufta | pt_BR |
dc.contributor.author | Mullally, Fergal | pt_BR |
dc.contributor.author | Nather, R. Edward | pt_BR |
dc.contributor.author | Sullivan, Denis J. | pt_BR |
dc.contributor.author | Thompson, S. E. | pt_BR |
dc.contributor.author | Winget, Donald Earl | pt_BR |
dc.date.accessioned | 2015-01-15T02:15:12Z | pt_BR |
dc.date.issued | 2009 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/108978 | pt_BR |
dc.description.abstract | We are searching for new He atmosphere white dwarf pulsators (DBVs) based on the newly found white dwarf stars from the spectra obtained by the Sloan Digital Sky Survey. DBVs pulsate at hotter temperature ranges than their better known cousins, the H atmosphere white dwarf pulsators (DAVs or ZZ Ceti stars). Since the evolution of white dwarf stars is characterized by cooling, asteroseismological studies of DBVs give us opportunities to study white dwarf structure at a different evolutionary stage than the DAVs. The hottest DBVs are thought to have neutrino luminosities exceeding their photon luminosities, a quantity measurable through asteroseismology. Therefore, they can also be used to study neutrino physics in the stellar interior. So far we have discovered nine new DBVs, doubling the number of previously known DBVs. Here we report the new pulsators’ light curves and power spectra. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Bristol. Vol. 690, no. 1 (Jan. 2009), p. 560-565 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Pulsacoes estelares | pt_BR |
dc.subject | Stars: general | en |
dc.subject | Stars: oscillations | en |
dc.subject | Espectros estelares | pt_BR |
dc.subject | Estrelas variaveis | pt_BR |
dc.subject | Stars: variables: other | en |
dc.subject | Anãs brancas | pt_BR |
dc.subject | White dwarfs | en |
dc.title | New pulsating db white dwarf stars from the Sloan Digital Sky Survey | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000766122 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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