Discovery of twelve ZZ Ceti stars

被引：0

作者：

Castanheira, B. G. ^{[1
]}

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

Kleinman, S. J. ^{[3
]}

Nitta, A. ^{[3
]}

Fraga, L. ^{[4
]}

机构：

[1] Inst Astron, Turkenschanzstr 17, A-1180 Vienna, Austria

[2] Univ Fed Rio Grande do Sul, Departamento Astronomia, BR-91501970 Porto Alegre, RS, Brazil

[3] Gemini Observ, Hilo, HI 96720 USA

[4] Southern Observ Astrophys Res, La Serena, Chile

来源：

17TH EUROPEAN WHITE DWARF WORKSHOP | 2010年 / 1273卷

关键词：

Pulsations; oscillations; stellar seismology; INSTABILITY STRIP;

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the SOAR 4.1-m telescope, we discovered low amplitude pulsations in three stars previously reported as Not-Observed-to-Vary (NOV), which are inside the ZZ Ceti instability strip. We also report the variability of nine new pulsating stars, bringing the total number of known ZZ Ceti stars to 149. In addition, we lowered the detection limit for 10 NOVs located near the edges of the instability strip. Our results are consistent with a pure mass-dependent ZZ Ceti instability strip.

引用

页码：500 / 503

页数：4

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