RHESSI hard X-ray imaging spectroscopy of the large gamma-ray flare of 2002 July 23

被引：99

作者：

Emslie, AG ^{[1
]}

Kontar, EP

Krucker, S

Lin, RP

机构：

[1] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA

[2] Univ Glasgow, Dept Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland

[3] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

ASTROPHYSICAL JOURNAL | 2003年 / 595卷 / 02期

基金：

美国国家航空航天局;

关键词：

Sun : flares; Sun : X-rays; gamma rays;

D O I：

10.1086/378931

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) hard X-ray images in different energy bands for the large X-class flare of 2002 July 23; these images are used to construct spatially resolved hard X-ray spectra for each of four prominent features: a bright, soft source high in the corona, two localized, hard footpoints in opposite polarity magnetic regions that show highly correlated flux and spectral variations in time, and a third footpoint bounded by the other three sources. The power-law spectral indices of the two correlated footpoints differ by similar to0.3-0.4, which may be the result of differing column densities from the electron source.

引用

页码：L107 / L110

页数：4

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