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http://hdl.handle.net/10183/108922
Título | Eleven new DA white dwarf variable stars from the Sloan Digital Sky Survey |
Autor |
Mullally, Fergal
Thompson, S. E. Castanheira, Bárbara Garcia Winget, Donald Earl Kepler, Souza Oliveira Eisenstein, D.J. Kleinman, Scot James Nitta, Atsuko |
Abstract | We report the discovery of 11 new variable DAwhite dwarf (ZZ Ceti) stars. Candidates were selected by deriving temperatures from model fits to spectra obtained from the Sloan Digital Sky Survey (SDSS). We also find objects whose temperatures and gravities indicate they lie within the instability strip for pulsation but were not observed to vary. Although the temperatures are based on relatively low signal-to-noise ratio spectra, an impure strip is unexpected, which if confirmed, has implications for DA asteroseismology. This work brings the total number of published variable DA white dwarf stars to 82. |
Contido em | The astrophysical journal. Chicago. Vol. 625, no. 2, pt. 1 (June 2005), p. 966-972 |
Assunto |
Anãs brancas
Asterosismologia Catalogos astronomicos Espectros estelares Estrelas variaveis Pulsacoes estelares [en] Stars: oscillations [en] White dwarfs |
Origem | Estrangeiro |
Tipo | Artigo de periódico |
URI | http://hdl.handle.net/10183/108922 |
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000536660.pdf (607.3Kb) | Texto completo (inglês) | Adobe PDF | Visualizar/abrir |
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