X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances

Details X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996uxsa.conf...79k&link_type=abstract

11th Colloquium on UV and X-ray Spectroscopy of Astrophysical and Laboratory Plasmas, p. 79 - 82

Physics

X Rays, Spectroscopy, Solar Flares, Plasmas (Physics), Ion Density (Concentration), High Energy Electrons, Spectral Line Width, Thermal Energy, Thermal Plasmas, X Ray Analysis, Electron Energy, Microwaves, Spectrum Analysis

Scientific paper

We have studied the time evolution of BCS spectra of He - like S (15), Ca(19) and Fe(25) ions observed by the Yohkoh satellite for solar flares on 6th September 1992 at 05:05 (M2.4 class) and 08:59(M3.3 class). Electron temperatures are derived through the fit of the synthetic spectra to the observed ones. Apparent ion temperatures are derived from the line width of S(15) and Ca(19) spectra. The blue shifted component in the rising phase is separated from the main component of the Ca(19) spectra. The emission measures are derived from the spectra without assuming ionization equilibrium and solar abundances for the first time. The time variation of these parameters are compared with hard X-rays, soft X-rays and radio measurements. In the preheating phase, the moderate increase of thermal plasma with turbulence indicated from the line width is observed. The time evolution of the blue shift component coincides with that of the burst in hard X-rays and microwaves which are produced by non-thermal high energy electrons. The ion density ratios derived from the spectra show a time-dependent non equilibrium ionization. They are shifted from the equilibrium values indicating an ionizing plasma.

Affiliated with

Also associated with

No associations

Rating

X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray spectral analysis of YOHKOH BCS data on Sep. 6, 1992 flares: Blue shift component and ion abundances will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-859274