FUSE observations of EC14026 stars

被引：22
作者：
Chayer, P
Fontaine, G
Fontaine, M
Lamontagne, R
Wesemael, F
Dupuis, J
Heber, U
Napiwotzki, R
Moehler, S
机构：
[1] Johns Hopkins Univ, Bloomberg Ctr Phys & Astron, Baltimore, MD 21205 USA
[2] Univ Victoria, Dept Phys & Astron, Victoria, BC V8W 2Y2, Canada
[3] Univ Montreal, Dept Phys, Montreal, PQ H3C 3J7, Canada
[4] Univ Erlangen Nurnberg, Astron Inst, Dr Remeis Sternwarte, D-8520 Erlangen, Germany
[5] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany
来源：
ASTROPHYSICS AND SPACE SCIENCE | 2004年 / 291卷 / 3-4期
关键词：
diffusion; abundances; oscillations; horizontal-branch; subdwarfs;
D O I：
10.1023/B:ASTR.0000044344.92680.b8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present a FUSE abundance analysis of EC14026 stars. We compare the abundances of heavy elements in the atmospheres of EC14026 stars to non-pulsating stars with similar atmospheric parameters, and investigate whether weak stellar winds could explain the coexistence of variable and non-variable sdB stars in the log g-T-eff diagram. We also present preliminary results on time-dependent diffusion calculations of iron in presence of radiative levitation and mass loss, and show how weak stellar winds can affect the diffusive equilibrium between gravitational settling and radiative support.
引用
收藏
页码：359 / 366
页数：8
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