FOS OBSERVATIONS OF G117-B15A AND THE BLUE EDGE OF THE ZZ CETI INSTABILITY STRIP

被引：0
|
作者：
KOESTER, D
ALLARD, NF
VAUCLAIR, G
机构：
[1] OBSERV PARIS, DEPT ATOMES & MOLEC ASTROPHYS, F-92195 MEUDON, FRANCE
[2] CNRS, INST ASTROPHYS, F-75014 PARIS, FRANCE
[3] OBSERV MIDI PYRENEES, F-31400 TOULOUSE, FRANCE
来源：
ASTRONOMY & ASTROPHYSICS | 1994年 / 291卷 / 01期
关键词：
STARS; OSCILLATIONS; WHITE DWARFS; INDIVIDUAL; G117-B15A;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
From an analysis of FOS observations of G117-B15A, one of the hottest members of the ZZ Ceti class, we derive an effective temperature of 12250+/-125 K. Since several other DA near the blue edge of the instability strip must have very similar temperatures according to their UV spectra, it is likely that the blue edge is lower than assumed until now. The spectrum can only be fitted, if we assume a relatively high convective efficiency, corresponding to a mixing-length parameter of about 2.
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页码：L9 / L12
页数：4
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