X-ray line widths and coronal heating

Abstract

view Abstract Citations (60) References (18) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS X-ray line widths and coronal heating Acton, L. W. ; Wolfson, C. J. ; Joki, E. G. ; Culhane, J. L. ; Rapley, C. G. ; Bentley, R. D. ; Gabriel, A. H. ; Phillips, K. J. H. ; Hayes, R. W. ; Antonucci, E. Abstract Preliminary results of spectroscopy and imaging of a solar active region and flare plasma in soft X-ray emission lines are presented. Observed X-ray line widths in a nonflaring active region are broader than the Doppler width corresponding to the local electron temperature. An analysis of 41 soft X-ray flares within a single active region reveals a preference for flares to occur at locations that already show enhanced X-ray emission and to favor magnetic complexity over high gradient. However, flares do not appear to be directly responsible for the heating and X-ray production of the active regions. Publication: The Astrophysical Journal Pub Date: March 1981 DOI: 10.1086/183498 Bibcode: 1981ApJ...244L.137A Keywords: High Temperature Plasmas; Solar Corona; Solar Flares; Solar Maximum Mission; Solar Wind; Solar X-Rays; Spectral Line Width; Coronal Loops; Doppler Effect; Emission Spectra; X Ray Imagery; X Ray Spectroscopy; Solar Physics full text sources ADS |