Relation between magnetic helicity injection and flare activities in active region NOAA 8100

被引：24
|
作者：
Yokoyama, T [1 ]
Kusano, K
Maeshiro, T
Sakurai, T
机构：
[1] Natl Astron Observ, Nobeyama Radio Observ, Minamisa Ku, Nagano 3841305, Japan
[2] Hiroshima Univ, Grad Sch Adv Sci Matter, Higashihiroshima, Hiroshima 7398530, Japan
[3] Natl Astron Observ, Tokyo 1818588, Japan
来源：
MAGNETIC HELICITY AT THE SUN, IN SOLAR WIND AND MAGNETOSPHERES: VISTAS FROM X-RAY OBSERVATORIES | 2003年 / 32卷 / 10期
关键词：
D O I：
10.1016/S0273-1177(03)90631-4
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
The analysis of the magnetic helicity injection into active region NOAA 8100 is shown. This region is known as a source of many coronal activities such as flares. It is found that most of the flare events occurred about half a day after the helicity injection rate changed its sign. And the positions of Ha emission in flares well correspond to the helicity inversion lines in space. These results suggest that the sign-reversal of the helicity injection rate is a key signature of flare activities. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：1949 / 1952
页数：4
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