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.

引用

页码：L41 / L44

页数：4

共 40 条

[1] THE STRUCTURE OF THE STATIC CORONA AND TRANSITION REGION [J].