Highly charged ions from solar flares

Details Highly charged ions from solar flares Highly charged ions from solar flares

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997phst...73...98k&link_type=abstract

Physica Scripta, Volume 73, Issue , pp. 98-103 (1997).

Physics

3

Scientific paper

X-ray and UV spectra of highly charged ions have been measured from solar flares. In order to analyze these spectra we need detailed atomic data. We show the x-ray spectral analysis of solar flare spectra obtained by the Japanese satellite Yohkoh as an example of this atomic modeling. Electron temperatures are derived through the fit of the synthetic spectra to the observed SXV, Ca XIX and Fe XXV lines. From the spectra we have obtained the time dependence of the electron temperature, ion temperature, emission measure and ion abundances. Ion density ratios derived from the spectra show a time-dependent non-equilibrium ionization. We also discuss questions relating to the atomic processes.

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