Structural parameters of the hot pulsating B subdwarf PG 1219+534 from asteroseismology

S. Charpinet, G. Fontaine, P. Brassard, E. M. Green, P. Chayer

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

The observations and thorough analysis of the rapidly pulsating sdB star PG 1219+534 were discussed. A standard Fourier analysis of our high signal-to-noise ratio Canada-France-Hawaii Telescope (CFHT) light curves revealed the presence of nine distinct harmonic oscillations with periods in the range 122-172 s. It was found that PG 1219+534 had a relatively simple pulsation spectrum characterized by well separated components easily recognizable as independent modes. The results show that the optimal model solution was able to produce simultaneously the 9 periods observed in pG 1219+534 with an average dispersion of only ∼0.6%.

Original languageEnglish (US)
Pages (from-to)575-597
Number of pages23
JournalAstronomy and astrophysics
Volume437
Issue number2
DOIs
StatePublished - Jul 2005

Keywords

  • Stars: fundamental parameters
  • Stars: horizontal-branch
  • Stars: individual: PG 1219+534
  • Stars: interiors
  • Stars: oscillations
  • Stars: subdwarfs

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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