Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...253..557l&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 253, no. 2, Jan. 1992, p. 557-560.
Astronomy and Astrophysics
Astrophysics
2
Cooling, Solar Flares, Solar Radiation, Chromosphere, Stellar Structure
Scientific paper
The paper describes the morphology and evolution of the postflare loop system of April 28, 1980, which were obtained with the 40-cm coronograph at NSO/Sacramento Peak (USA). It was found that this flare loop system is still in variation during the stage of main phase; mass and energy in the loops are in dynamic equilibrium. The cooling time for a single loop was estimated on the basis of losses due to radiation, thermal conduction, and adiabatic expansion of plasma in the loop. The results show that radiative cooling dominates conductive and expansion cooling in the cool (T about 10 exp 4 K) flare loops. The nature of the likely resources which permit the loops to stay bright for a long time is discussed.
Lin Juhn-Jong
Smartt Raymond N.
Wang Ziqiang
Zhang Zhongsheng
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