2D spectra analysis of a SN/C5.6 flare on 19 March 1993.

Details 2D spectra analysis of a SN/C5.6 flare on 19 March 1993. 2D spectra analysis of a SN/C5.6 flare on 19 March 1993.

Jan 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jnanu..35...21y&link_type=abstract

J. Nanjing Univ., Nat. Sci., Vol. 35, No. 1, p. 21 - 27

Physics

Solar Flares: H Alpha

Scientific paper

On 19 March 1993, a SN/C5.6 flare occurred near the center of the solar disk at ≡02:19 UT. Twodimensional Hα spectra were obtained by using an imaging spectrograph installed at the Solar Tower Telescope of Nanjing University. The 2D line center intensity contours show that the flare has three main kernels. Their morphology, structure and evolution are different, while the red asymmetry at the Hα wings is common for the three regions. Based on the asymmetries of the Hα lines, the authors derive a time series of 2D velocity fields for the flare. The results indicate that the inferred downward velocities are various in different regions.

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