Time-Dependent Ionization in Radiatively Cooling Gas
Gnat & Sternberg 2007   ApJS, 168, 213



We present new computations of the equilibrium and non-equilibrium cooling efficiencies and ionization states for radiatively cooling gas clouds with temperatures between 108 and 104K. We focus on the behavior for pure radiative cooling with no external sources of heat or photoionization. We include the elements H, He, C, N, O, Ne, Mg, Si, S, and Fe, and present results for heavy element compositions ranging from 10-3 to 2 times the elemental abundances in the Sun.

Get Full Text: pdf , ps, electronic (restricted).        Get On-Line Data Files.        Use Web Tools.

   Ionization States Cooling Efficiencies Diagnostic Diagrams
   Calculate ion-fractions at a user-supplied
temperature, and download tables and figures:
Compute cooling efficiencies at a user-supplied
temperature, and download tables and figures:
Generate diagnostic diagrams for
user-defined ionic species:
  
  • Collisional ionization Equilibrium (CIE)
  • Time-Dependent (Non-Equilibrium) Cooling
  • Collisional ionization Equilibrium (CIE)
  • Time Dependent (Non-Equilibrium) Cooling
  • Ratio-Ratio Diagrams
  • Ratio-Absolute Column Diagrams
  •   



    Constructed: June 2006, Orly Gnat