Stellar Coronae:
Hot, Collisional X-Ray Sources
v  Physical environment:
Hot (kT ~ 0.1 – 3 keV)
Density (n ~ 1010 cm-3)
Optically thin

v Ionization balance:
Standard electron-ion
collisional processes:
CI, RR, as well as EA
and DR
v Line excitation:
Electron impact
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