Preflare nonthermal emission observed in microwaves and hard X-rays

被引：29

作者：

Asai, A ^{[1
]}

Nakajima, H

Shim, M

White, SM

Hudson, HS

Lin, RP

机构：

[1] Natl Astron Observ, Nobeyama Solar Radio Observ, Nagano 3841305, Japan

[2] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

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

来源：

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN | 2006年 / 58卷 / 01期

关键词：

sun : corona; sun : flares; sun : particle acceleration; sun : radio radiation; sun; X-rays; gamma rays;

D O I：

10.1093/pasj/58.1.L1

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present a detailed examination oil nonthermal emissions during the preflare phase of the X4.8 flare that Occurred oil 2002 July 23. The microwave (17 GHz and 34 GHz) data obtained with the Nobeyama Radioheliograph at Nobeyama Solar Radio Observatory and the hard X-ray data taken with the Reuven Ramaty Hi-fi Energy Solar Spectroscopic Imager obviously Showed nonthermal Features in the preflare phase. We also found a faint ejection associated with the flare in the EUV images taken with the Transition Region and Coronal Explorer. We discuss the temporal and spatial features Of the nonthermal emissions in the preflare phase, and their relation with the ejection.

引用

页码：L1 / L5

页数：5