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xstar Model: H II region

In this example we model an H II region with parameters corresponding to the first of the Lexington benchmarks (see appendix C). In this case we give only the prompted values. This illustrates the use of a blackbody spectrum, with temperature given in keV, and non-solar abundances.

unix > xstar
 xstar version 2.2
covering fraction (0.:1.) [1.] 
temperature (/10**4K) (0.:1.e4) [100.] 1.
constant pressure switch (1=yes, 0=no) (0:1) [0] 
pressure (dyne/cm**2) (0.:1.) [0.03] 
density (cm**-3) (0.:1.e18) [1.E+12] 1.e+2
spectrum type?[pow] bbody
radiation temperature or alpha?[-1.] 0.004
luminosity (/10**38 erg/s) (0.:1.e10) [1.] 12.7
column density (cm**-2) (0.:1.e25) [1.E23] 
log(ionization parameter) (erg cm/s) (-10.:+10.) [2.] 0.15
hydrogen abundance (0.:100.) [1.] 
helium abundance (0.:100.) [1.] 
carbon abundance (0.:100.) [1.]0.5945
nitrogen abundance (0.:100.) [1.] 0.3639
oxygen abundance (0.:100.) [1.] 0.4739
neon abundance (0.:100.) [1.] 1.7865
magnesium abundance (0.:100.) [1.] 0.
silicon abundance (0.:100.) [1.] 0.
sulfur abundance (0.:100.) [1.] 0.563
argon abundance (0.:100.) [1.] 0.
calcium abundance (0.:100.) [1.] 0.
iron abundance (0.:100.) [1.] 0.
nickel abundance (0.:100.) [1.] 0.
model name[xstar Default] H II region



Tim Kallman 2014-04-04