Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-03-29
Astronomy and Astrophysics
Astrophysics
4 pages, A&A Letters, 2001, in press
Scientific paper
10.1051/0004-6361:20010301
An extended radio emission after a soft X-ray (SXR) maximum was detected in the active region NOAA 9077 by several observatories for the solar flare after 21:42 UT on July 10, 2000. Also some radio fine structures before the enduring radio emission were observed with the 1.0-2.0 GHz spectrometer of Beijing Astronomical Observatory (BAO) in the same time. We apply a shear-driven quadrupolar reconnection model (SQR) to analyze the fine structures and the related radio emission. We find that the footpoint shear motion of the flux loop is accompanied with the emerging up of the loop during the reconnection process. We tentatively interpret the extended radio emission as the nonthermal radiation caused by a new reconnection process between emerging flux loop and pre-existing overarching loop after the soft X-ray maximum.
Fu Qijun
Wang Shujuan
Yan Yihua
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