To detect vertical velocity fields from observed Hα profiles we analyse spectral line profile asymmetries in the flare on August 10, 2003. In addition to a bisector method we use a comparison of the observed and non-LTE calculated profiles. In most of the analysed flare kernels we detect a weak blue asymmetry and interpret it in terms of a downward motion. Capacities and results of the two methods are compared and discussed.
Central European Astrophysical Bulletin
- Pub Date:
- solar flares;
- line profile asymmetry