WeÕre talking about thermal, collisional/coronal,
equilibrium, optically thin plasmas hereÉ probably
Diagnostics and Physical Properties
Temperatures and overall emission levels: DEMs
Densities: line ratiosÉbut also source location via f/i
Abundances: line ratios and line-to-continuum ratios
Kinematics: line broadening and profile shapes
Chandra (and XMM) have increased the spectral resolution
available to X-ray astronomers by almost a factor of 100.