Diagnostics of solar ions: Ne VI, Mg VI, Si VIII and Mg VIII observed by SERTS

Abstract

Diagnostics of solar ions Ne vi, Mg vi, Si viii, and Mg viii in an active region observed by SERTS have been presented. Density, temperature, and electron pressure in the emitting source have been derived from theoretical line-ratio curves and its EUV spectrum obtained by SERTS. The variation of neon-to-magnesium and silicon-to-magnesium abundances has been discussed in the interpretation of the active region spectrum obtained by SERTS. © 1995 Kluwer Academic Publishers.