Computation and analysis of the physical fields of a disc flare loop

Details Computation and analysis of the physical fields of a disc flare loop Computation and analysis of the physical fields of a disc flare loop

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986acasn..27..237y&link_type=abstract

(Acta Astronomica Sinica, vol. 27, no. 3, 1986, p. 237-246) Chinese Astronomy and Astrophysics (ISSN 0275-1062), vol. 11, March

Statistics

Computation

5

Computational Astrophysics, H Alpha Line, Solar Flares, Spectrum Analysis, Data Reduction, Doppler Effect, Least Squares Method, Optical Thickness, Radial Velocity, Stellar Models

Scientific paper

A preliminary reduction was carried out of the H-alpha-SSHG spectral data on the large, double-ribbon, class 3B flare of May 16, 1981 obtained at Yunnan Observatory. A least-squares fit of a nonlinear function was used to derive simultaneously from the observed profile, the optical depth at the line center, the Doppler width, the mean source function and the radial velocity, thus providing an example of a numerical treatment of data having the characteristics of a time-space series. The results of calculation show that matter inside the flare loop was falling along the loop legs to the chromosphere and that it would be more reasonable to use the chromospheric evaporation model to account for the source of the loop matter.

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