Radiative transfer of X-rays in the solar corona

Abstract

view Abstract Citations (45) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Radiative transfer of X-rays in the solar corona. Acton, L. W. Abstract The problem of resonance scattering of X-ray emission lines in the solar corona is investigated. For the resonance lines of some helium-like ions, significant optical depths are reached over distances small compared with the size of typical coronal features. A general integral equation for the transfer of resonance-line radiation under solar coronal conditions is derived. This expression is in a form useful for modeling the complex three-dimensional temperature and density structure of coronal active regions. The transfer equation is then cast in a form illustrating the terms which give rise to the attenuation or enhancement of the resonance-line intensity. The source function for helium-like oxygen (O VII) under coronal conditions is computed and discussed in terms of the relative importance of scattering. Publication: The Astrophysical Journal Pub Date: November 1978 DOI: 10.1086/156575 Bibcode: 1978ApJ...225.1069A Keywords: Optical Thickness; Radiative Transfer; Solar Corona; Solar X-Rays; X Ray Scattering; Line Spectra; Resonance Scattering; X Ray Spectra; Solar Physics; Radiative Transfer:Solar X Rays; Solar Corona:X Rays full text sources ADS |