Physics
Scientific paper
Apr 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984soph...91..325s&link_type=abstract
Solar Physics (ISSN 0038-0938), vol. 91, April 1984, p. 325-344. Research supported by the Lockheed Independent Research Program
Physics
50
Solar Flares, Solar X-Rays, Energy Budgets, Light Curve, Solar Corona, Solar Magnetic Field, Solar Maximum Mission, Solar Spectra
Scientific paper
Extensive data from the Solar Maximum Mission (SMM) and ground-based observatories are presented for two flares; the first occurred at 12:48 UT on 31 August, 1980 and the second just 3 min later. They were both compact events located in the same part of the active region. The first flare appeared as a typical X-ray flare: the Ca XIX X-ray lines were broadened (≡190±40 km s-1) and blue shifted (≡60±20 km s-1) during the impulsive phase, and there was a delay of about 30 s between the hard and soft X-ray maxima. The relative brightness of the two flares was different depending on the spectral region being used to observe them, the first being the brighter at microwave and hard X-ray wavelengths but fainter in soft X-rays. The second flare showed no significant mass motions, and the impulsive and gradual phases were almost simultaneous. The physical characteristics of the two flares are derived and compared.
Benz Arnold O.
Dennis Brian R.
Leibacher John W.
Mewe Rolf
Poland Arthur I.
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