Asteroseismology of GD358 with complex core carbon and oxygen profiles

Agnès Bischoff-Kim, Judith L. Provencal

Research output: Contribution to journalArticle

Abstract

GD 358 is the brightest (m v=13.7) and best studied helium atmosphere white dwarf pulsator. We present an analysis based on over 1000 hours of observations spanning 2007-2014 as well as archival data going back to 1982. From the complete data set, we identify a total of 27 independent frequencies and fit 14 of them as m=0 modes in our asteroseismic analysis. We add GD358 to a set of helium atmosphere white dwarfs fitted with similar models. With this consistent set, we can see a trend in the thickness of the pure helium layer that are quantitatively consistent with time-dependent diffusion calculations.

Original languageEnglish (US)
Pages (from-to)489-492
Number of pages4
JournalProceedings of the International Astronomical Union
Volume11
Issue numberA29B
DOIs
Publication statusPublished - Jan 1 2015

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All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science

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