Relative Coronal Abundances Derived from X-Ray Observations of Nitrogen,Oxygen,Neon,Magnesium,and Iron.

摘要

The authors have observed the coronal spectrum between 8.5and 25 A with the crystal spectrometer on the OV1-10satellite. The measured fluxes of the resonance lines of O VII, O VIII,Ne IX,Ne X,and Mg XI have been used to construct a model of the coronal emission measure between 1and 6 millionK. This model has been used to determine the relative abundances of O,Ne,and Mg. The relative abundances of N and Fe were also computed,using the observed intensities of the resonance lines of N VII and Fe XVII. The authors have used the coronal model based on the line fluxes to calculate the expected continuum fluxes,and compared these calculated fluxes with the observed contrinuum fluxes. (Modified author abstract)