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THE EXTREME-ULTRAVIOLET SPECTRUM OF ALPHA AURIGAE (CAPELLA)

被引：126
作者：
DUPREE, AK
BRICKHOUSE, NS
DOSCHEK, GA
GREEN, JC
RAYMOND, JC
机构：
[1] UNIV COLORADO, CASA, BOULDER, CO 80304 USA
[2] HARVARD SMITHSONIAN CTR ASTROPHYS, CAMBRIDGE, MA 02138 USA
[3] USN, RES LAB, WASHINGTON, DC 20375 USA
来源：
ASTROPHYSICAL JOURNAL | 1993年 / 418卷 / 01期
关键词：
STARS; CHROMOSPHERES; GIANT; MASS LOSS; INDIVIDUAL; (ALPHA-AURIGAE);
D O I：
10.1086/187111
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Extreme ultraviolet spectra (lambdalambda 70-740) of the bright spectroscopic binary system, Capella (Alpha Aurigae) obtained with the Extreme Ultraviolet Explorer satellite (EUVE), show a rich emission spectrum-dominated by iron emission lines: Fe XV-XXIV. The emission measure for the system reveals a continuous distribution of plasma temperatures between 10(5) and 10(7.8) K, with a clear minimum near 10' K and a local maximum at 6 x 10(6) K. Electron density diagnostics based on Fe XXI indicate N(e) almost-equal-to 4 x 10(11)-10(13) cm-3 at T(e) = 10(7) K.
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页码：L41 / L44
页数：4
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