Whole Earth Telescope observations of the DBV white dwarf GD 358
dc.contributor.author | Winget, Donald Earl | pt_BR |
dc.contributor.author | Nather, R. Edward | pt_BR |
dc.contributor.author | Clemens, J. Christopher | pt_BR |
dc.contributor.author | Provencal, Judith L. | pt_BR |
dc.contributor.author | Kleinman, Scot James | pt_BR |
dc.contributor.author | Bradley, Paul A. | pt_BR |
dc.contributor.author | Claver, C.F. | pt_BR |
dc.contributor.author | Dixson, James S. | pt_BR |
dc.contributor.author | Montgomery, Michael Houston | pt_BR |
dc.contributor.author | Hansen, Carl J. | pt_BR |
dc.contributor.author | Hine, B.P. | pt_BR |
dc.contributor.author | Birch, P. | pt_BR |
dc.contributor.author | Candy, M. | pt_BR |
dc.contributor.author | Marar, T.M. Krishnan | pt_BR |
dc.contributor.author | Seetha, S. | pt_BR |
dc.contributor.author | Ashoka, B.N. | pt_BR |
dc.contributor.author | Leibowitz, Elia M. | pt_BR |
dc.contributor.author | O'Donoghue, Darragh | pt_BR |
dc.contributor.author | Warner, B. | pt_BR |
dc.contributor.author | Buckley, David A.H. | pt_BR |
dc.contributor.author | Tripe, P. | pt_BR |
dc.contributor.author | Vauclair, Gérard | pt_BR |
dc.contributor.author | Dolez, Noël | pt_BR |
dc.contributor.author | Chevreton, Michel | pt_BR |
dc.contributor.author | Serre, T. | pt_BR |
dc.contributor.author | Garrido, R. | pt_BR |
dc.contributor.author | Kepler, Souza Oliveira | pt_BR |
dc.contributor.author | Kanaan Neto, Antonio Nemer | pt_BR |
dc.contributor.author | Augusteijn, T. | pt_BR |
dc.contributor.author | Wood, Matthew A. | pt_BR |
dc.contributor.author | Bergeron, Pierre | pt_BR |
dc.contributor.author | Grauer, Albert D. | pt_BR |
dc.date.accessioned | 2015-01-08T02:13:07Z | pt_BR |
dc.date.issued | 1994 | pt_BR |
dc.identifier.issn | 0004-637X | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/108838 | pt_BR |
dc.description.abstract | We report on the analysis of 154 hours of early continuous high-speed photometry on the pulsating DB white dwarf (DBV) GD 358, obtained during the Whole Earth Telescope (WET) run of 1990 May. The power spectrum of the light curve is dominated by power in the range from 1000 to 2400 μHz, with more than 180 significant peaks in the total spectrum. We identify ali of the triplet frequencies as degree l = 1, and from the details of their spacings we derive the total stellar mass as 0.61 ± 0.03 Mʘ , the mass of the outer helium envelope as 2.0 ± 1.0 x 10-6 M*, the absolute luminosity as 0.050 ± 0.012 Lʘ and the distance as 42 ± 3 pc. We find strong evidence for differential rotation in the radial direction−the outer envelope is rotating at least 1.8 times faster than the core−and we detect the presence of a weak magnetic field with a strength of 1300 ± 300 G. We also find a significant power at the sums and differences of the dominant frequencies, indi cating nonlinear processes are significant, but they have a richness and complexity that rules out resonant mode coupling as a major cause. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The astrophysical journal. Chicago. Vol. 430, no. 2, pt. 1 (Aug. 1994), p. 839-849 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Stars: individual (GD 358) | en |
dc.subject | Astrofisica estelar | pt_BR |
dc.subject | Observações astronômicas no visível | pt_BR |
dc.subject | Stars: oscillations | en |
dc.subject | Pulsacoes estelares | pt_BR |
dc.subject | White dwarfs | en |
dc.subject | Fotometria estelar | pt_BR |
dc.subject | Estrelas variaveis | pt_BR |
dc.subject | Anãs brancas | pt_BR |
dc.title | Whole Earth Telescope observations of the DBV white dwarf GD 358 | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000256163 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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