Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987cha%26a..11..162s&link_type=abstract
Chinese Astronomy and Astrophysics, Volume 11, Issue 2, p. 162-170.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Filtergrams of the 1B/M1-M4 Hα flare of 1980 November 5 were digitized and the resulting isophote map compared with the hard X-, soft X, and microwave images. It was found: 1) During the first maximum. the high energy electrons did not penetrate the chromosphere. The Hα flare was probably caused by heat conduction from the (+7)-(+8) K hot plasma which generated the hard and soft X emissions. 2) The second maximum can be inferred to have been caused by bremsstrahlung of high energy electrons. The Hα maximum lagged behind the X-ray burst by not more than 5 seconds. 3) During the flash phase the area and the intensity of Hα emission increased in step with each other. 4) From the changes in the transverse magnetic field as outlined by Hα fibrils, (+31) ergs of magnetic energy is estimated to have been released in this flare.
Shi Zhong-Xian
Wang Jing-Xiu
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