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Hard X-ray imaging of a solar gradual hard X-ray burst on April 1, 1981
TAKAKURA, T; OHKI, K; SAKURAI, T; WANG, JL; Xuan JY(宣家余); Li SC(李苏川); ZHAO, RY
发表期刊SOLAR PHYSICS
1984
卷号94期号:2页码:359-367
DOI10.1007/BF00151323
产权排序第4完成单位
收录类别SCI
摘要An intense solar X-ray burst occurred on April, 1981. X-ray images of this gradual hard X-ray burst were observed with the hard X-ray telescope aboard the Hinotori satellite for the initial ten minutes of rise and maximum phases of the burst. The hard X-ray images (13-29 keV) look like a large loop without considerable time variation of an elongated main source during the while observation period. The main X-ray source seems to lie along coronal arcade 20,000 km above a neutral line, while a tongue-like subsource may be another large coronal loop (although the whole structure of the X-ray source looks like a large semicircular loop. Both nonthermal and hot thermal (3-4 x 10 K) electrons are contributing to the source image. The ratio of these components changed in a wide range, from 2.3 to 0.4, during the observation, while the image was rather steady. This suggests that both heating and accelerations of electrons are occurring simultaneously in a common source. Energetic electrons of 15-30 keV would be collisionally trapped in the coronal magnetic loops with density of the order of 10 to the 11th/cu cm.
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0038-0938
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WOS记录号WOS:A1984ABW6700011
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
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文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/5999
专题太阳物理研究组
通讯作者TAKAKURA, T
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TAKAKURA, T,OHKI, K,SAKURAI, T,et al. Hard X-ray imaging of a solar gradual hard X-ray burst on April 1, 1981[J]. SOLAR PHYSICS,1984,94(2):359-367.
APA TAKAKURA, T.,OHKI, K.,SAKURAI, T.,WANG, JL.,宣家余.,...&ZHAO, RY.(1984).Hard X-ray imaging of a solar gradual hard X-ray burst on April 1, 1981.SOLAR PHYSICS,94(2),359-367.
MLA TAKAKURA, T,et al."Hard X-ray imaging of a solar gradual hard X-ray burst on April 1, 1981".SOLAR PHYSICS 94.2(1984):359-367.
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