An emission spectrum from hot diffuse gas based on the model calculations of Mewe and Gronenschild (as amended by Kaastra). The model includes line emissions from several elements.
par1 = plasma temperature in keVpar2 = hydrogen density in cm
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par3 = Metal abundances (He fixed at cosmic). The elements included are
C, N, O, Ne, Na, Mg, Al, Si, S, Ar, Ca, Fe, Ni. Abundances are
set by the abund command.
par4 = redshift, z
K =
, where D is the distance to the
source (cm),
and
are the electron and H densities (cm
)
The references for the MEKA model are as follows :
Similar credit may also be given for the adopted ionization balance e.g.: