A complex solar radio burst and the characteristics of its related microwave sources and EUV coronal loops |
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| Institution: | 1. National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, China;2. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;1. Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea;2. Department of Ophthalmology, Hallym University Chuncheon Sacred Heart Hospital, Chuncheon, Republic of Korea;3. Department of Ophthalmology, Chungnam National University Sejong Hospital, Sejong, Republic of Korea;1. Department of Ophthalmology, Croix-Rousse University Hospital, Hospices Civils de Lyon, Lyon, France;2. UMR-CNRS 5510 Matéis, University Lyon 1, Villeurbane, France;1. Department of Ophthalmology, Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, USA;2. Department of Ophthalmology and Visual Sciences, University of Iowa Carver College of Medicine, Iowa City, Iowa, USA |
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| Abstract: | On 2001 Oct. 19, a very complex solar radio burst with a host of interesting features was observed with a broadband (0.7–7.6 GHz) solar radio spectrometer. Combining with the data of NoRH (Nobeyama Radio Heliograph) and TRACE (Transition Region and Corona Explorer), the spectral features of the radio burst, the evolution of the microwave radio sources, and relations with the complex EUV coronal loops are analyzed. The burst is the radio manifestation of a large double-ribbon flare; it consisted of two stages. The earlier stage was dominated bya broadband burst in the centimeter-meter waveband from gyro-synchrotron emission of sources at the footpoints of the loop. The later stage was dominated by a narrow-band decimeter wave burst in the decimetermeter waveband, from a combination of plasma emission and gyro-resonance emission from sources in the top of the loop. |
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