Overtures to the pulsational instability of ZZ Ceti variables

被引：0
|
作者：
Gautschy, A
Ludwig, HG
Freytag, B
机构：
[1] MAX PLANCK INST ASTROPHYS, D-85740 GARCHING, GERMANY
[2] CHRISTIAN ALBRECHTS UNIV KIEL, INST ASTRON & ASTROPHYS, D-24098 KIEL, GERMANY
来源：
ASTRONOMY & ASTROPHYSICS | 1996年 / 311卷 / 02期
关键词：
convection; stars; interiors; oscillations; white dwarfs;
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Results of nonradial, nonadiabatic pulsation calculations on hydrogen-rich white dwarf models are presented. In contrast to earlier attempts, the modeling builds on hydrodynamically simulated convective surface layers supplemented with standard interior models. Based on our stellar models and despite of various simple attempts to couple convection and pulsation we could not reproduce theoretically the presently adopted location of the observed blue edge of the ZZ Ceti variables. When the convective efficiency is high enough we found a sensitive dependence of the stability properties of the g modes on the pulsational treatment of shear within the convection zone.
引用
收藏
页码：493 / 508
页数：16
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