Computer Science
Scientific paper
Jul 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994kofu.symp..397h&link_type=abstract
In: Proceedings of Kofu Symposium, Kofu, Japan, Sept. 6-10, 1993, p.397-400.
Computer Science
5
Scientific paper
Three of the nine white-light flares thus far discovered in the Yohkoh white-light data were also observed at the Nobeyama Radio Observatory at its 80 GHz polarimeter. Each of the three flares was relatively close to the center of the Sun and had an H_alpha importance of 2B-3B, but the X-ray classes were quite different: the flares of 27 Oct. 1991, 15 Nov. 1991, and 14 Feb. 1992 had GOES X-ray magnitudes of X6.1, X1.5, and M7.0 respectively. We have analyzed the characteristics of these flares at white-light, X-ray and radio wavelengths in order to find clues for the emission mechanisms of the white-light and millimeter-wave continuum. Each of these three flares had both impulsive and gradual optical emissions. Using the Yohkoh soft X-ray images we associate the gradual component of white-light emission in these flares with compact high-temperature loops. We speculate that the white light itself comes from fine structures embedded in these loops, at densities greater than normal photospheric densities.
Driel-Gesztelyi L. V.
Hudson Hugh S.
Kosugi Taichi
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