Electron temperature and emission measure determinations of very faint solar flares

被引：20

作者：

Feldman, U ^{[1
]}

Doschek, GA ^{[1
]}

Behring, WE ^{[1
]}

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,GREENBELT,MD 20771

来源：

ASTROPHYSICAL JOURNAL | 1996年 / 461卷 / 01期

关键词：

Sun; flares; X-rays; gamma rays;

D O I：

10.1086/177073

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied 28 flares in the X-ray magnitude range of A2-A9 using high-resolution Bragg crystal spectrometer data obtained from instrumentation flown on the Yohkoh spacecraft. Flares in the A-class category can be detected in spectral lines of He-like ions formed at low temperatures. Their average temperature is approximately 5 x 10(6) K, and their emission measure as determined from the S XV resonance line near 5 Angstrom varies between 2 x 10(46) and 1 x 10(48) Cm-3.

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页码：465 / 471

页数：7

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