Asteroseismological analysis of rich pulsating white dwarts

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

We present the results of the asteroseismological analysis of two rich DAVs, G38-29 and R808, recent targets of the Whole Earth Telescope. 20 periods between 413 s and 1089 s were found in G38-29's pulsation spectrum, while R808 is an even richer pulsator, with 24 periods between 404 s and 1144 s. Traditionally, DAVs that have been analyzed asteroseismologically have had less than half a dozen modes. Such a large number of modes presents a special challenge to white dwarf asteroseismology, but at the same time has the potential to yield a detailed picture of the interior chemical make-up of DAVs. We explore this possibility by varying the core profiles as well as the layer masses. We use an iterative grid search approach to find best fit models for G38-29 and R808 and comment on some of the intricacies of fine grid searches in white dwarf asteroseismology.

Original languageEnglish (US)
Title of host publicationStellar Pulsation
Subtitle of host publicationChallenges for Theory and Observation - Proceedings of the International Conference
Pages621-624
Number of pages4
DOIs
StatePublished - Dec 1 2009
EventInternational Conference on Stellar Pulsation: Challenges for Theory and Observation - Santa Fe, NM, United States
Duration: May 31 2009Jun 5 2009

Publication series

NameAIP Conference Proceedings
Volume1170
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherInternational Conference on Stellar Pulsation: Challenges for Theory and Observation
CountryUnited States
CitySanta Fe, NM
Period5/31/096/5/09

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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  • Cite this

    Bischoff-Kim, A. (2009). Asteroseismological analysis of rich pulsating white dwarts. In Stellar Pulsation: Challenges for Theory and Observation - Proceedings of the International Conference (pp. 621-624). (AIP Conference Proceedings; Vol. 1170). https://doi.org/10.1063/1.3246573