wabs, zwabs: photoelectric absorption, Wisconsin cross-sections
A photo-electric absorption using Wisconsin (Morrison and McCammon; ApJ 270, 119) cross-sections.
![M(E) = exp[-n_H*sigma(E)]](XSmodelWabs_files/image001.gif){kind=small}
where s(E) is the photo-electric cross-section (NOT including Thomson scattering). Note that this model uses the Anders & Ebihara relative abundances (1982, Geochimica et Cosmochimica Acta 46, 2363) regardless of the abund command.
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par1= nH |
equivalent hydrogen column (in units of 1022 atoms cm–2) |
The zwabs variant allows the user to specify a (fixed) redshift parameter, and uses the corresponding formula
![M(E) = exp[-n_H*sigma(E[1+z])]](XSmodelWabs_files/image002.gif){kind=small}
|
par1= nH |
equivalent hydrogen column (in units of 1022 atoms cm–2) |
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par2= z |
redshift |