Keck time-resolved spectroscopy of G 29-38

被引：0

作者：

Clemens, JC ^{[1
]}

van Kerkwijk, MH ^{[1
]}

Wu, Y ^{[1
]}

Kleinman, SJ ^{[1
]}

机构：

[1] Univ N Carolina, Dept Phys & Astron, Chapel Hill, NC 27599 USA

来源：

11TH EUROPEAN WORKSHOP ON WHITE DWARFS | 1999年 / 169卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have conducted time-resolved spectroscopy of the ZZ Ceti star G 29-38 using the Keck II Low Resolution Imaging Spectrograph (LRIS). We have used these observations to test a method for identifying the spherical harmonic degree l of pulsation modes. The method relies upon model atmosphere predictions that mode amplitudes should change within spectral lines in an l-dependent manner. Our analysis of the observations shows amplitude changes consistent with model predictions, allowing us to identify the l value of the modes present. In addition, our data reveal the surface velocities associated with ZZ Ceti pulsations for the first time and provide a mean spectrum of extremely high signal-to-noise.

引用

页码：122 / 128

页数：7

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