Seismology of White Dwarfs: The ZZ Ceti Stars

被引：0

作者：

Castanheira, Barbara G. ^{[1
]}

Kepler, S. O. ^{[2
]}

机构：

[1] Univ Texas Austin, Dept Astron, RLM 15308, Austin, TX 78712 USA

[2] Univ Fed Rio Grande do Sul, BR-91510197 Porto Alegre, RS, Brazil

来源：

STELLAR PULSATION: CHALLENGES FOR THEORY AND OBSERVATION | 2009年 / 1170卷

关键词：

Pulsations; Oscillations; Stellar Seismology; DIGITAL SKY SURVEY; INSTABILITY STRIP; G117-B15A; DISCOVERY; EVOLUTION; SPECTRA; CATALOG; PERIODS;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate an extensive adiabatic model grid for pulsating white dwarfs with H dominated atmospheres, the ZZ Ceti stars. We developed a new approach for asteroseismology, using the relative observed amplitudes as weights, and compared the computed modes with the observed ones for the class of ZZ Ceti stars. We measure the H layer mass for 83 stars and found an average of M-H/M-* = 10(-6.3), which is thinner than the predicted value of M-H/M-* = 10(-4). Our results indicate that the stars lose more mass during their evolution than previously expected.

引用

页码：616 / +

页数：2

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