METRIC TYPE-III BURSTS FROM A FLARING X-RAY BRIGHT POINT NEAR AN ACTIVE-REGION

被引:17
作者
KUNDU, MR
RAULIN, JP
PICK, M
STRONG, KT
机构
[1] OBSERV MEUDON,F-92195 MEUDON,FRANCE
[2] LOCKHEED SOLAR & ASTROPHYS,PALO ALTO,CA 94304
关键词
SUN; CORONA; FLARES; RADIO RADIATION; X-RAYS; GAMMA RAYS;
D O I
10.1086/175662
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
X-ray bright points (XBPs) are known to show variability on a number of timescales, including impulsive X-ray brightenings. The relationship betweeen these XBP ''flares'' and normal flares is poorly known. A fundamental question is whether nonthermal acceleration of particles takes place in XBP flares. We address this issue by searching for nonthermal radio emission at metric wavelengths from flaring XBPs identified in Yohkoh/SXT data. Unequivocal evidence for type III-like radio bursts usually attributed to beams of nonthermal electrons on open field lines was found recently by Kundu et al. This suggests that XBP flares are similar to normal flares and can indeed accelerate nonthermal populations of energetic particles. Here we provide further evidence of metric type III bursts from flaring XBPs located near active regions.
引用
收藏
页码:922 / 928
页数:7
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