EXTREME ULTRAVIOLET SPECTROSCOPY OF CAPELLA

被引：6
|
作者：
GREEN, JC
WILKINSON, E
AYRES, TR
CASH, WC
机构：
[1] Ctr. Astrophys. and Space Astron., Campus Box 389, University of Colorado, Boulder
来源：
ASTROPHYSICAL JOURNAL | 1992年 / 397卷 / 02期
关键词：
STARS; INDIVIDUAL; (ALPHA-AURIGAE); ULTRAVIOLET;
D O I：
10.1086/186554
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The X-ray active binary system Capella was observed with a moderate-resolution extreme ultraviolet spectrograph from 200 to 330 angstrom. Two low-level emission features were detected. One most likely is geocoronal He II 304 angstrom emission, while the other probably originates from the corona of Capella. The weak stellar emission at 304 angstrom is in direct conflict with predictions of the intrinsic stellar He II flux based on standard scaling arguments but is consistent with the only previous observation of Capella in the EUV. The most plausible explanation for the lack of stellar 304 angstrom emission is a warm wind from the active GO III star.
引用
收藏
页码：L99 / L102
页数：4
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