Thermal and nonthermal flare emission observed with the Nobeyama Radio Heliograph |
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Authors: | K. Shibasaki T. Takano S. Enome H. Nakajima M. Nishio Y. Hanaoka C. Torii H. Sekiguchi T. Bushimata S. Kawashima N. Shinohara H. Koshiishi Y. Shiomi |
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Affiliation: | (1) Nobeyama Radio Observatory, Minamimaki, Minamisaku, 384-13 Nagano, Japan |
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Abstract: | The early phases of three flares, observed by the Nobeyama Radio Heliograph, are studied. Nonthermal and thermal radio sources are identified by comparison with soft X-ray images taken by the Soft X-ray Telescope onboard the Yohkoh satellite. Two of the flares are mainly of nonthermal origin and their location coincides with one of the footpoints of soft X-ray loops. Another flare has both thermal and nonthermal components which start to brighten simultaneously. This suggests that particle acceleration and plasma compression develop simultaneously. |
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Keywords: | solar flares radio emission nonthermal particles |
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