wabs, zwabs: photoelectric absorption, Wisconsin cross-sections

A photo-electric absorption using Wisconsin (Morrison & McCammon 1983) cross-sections.

$\begin{displaymath} M(E)=\exp[-\eta_H\sigma(E)] \end{displaymath}$

where $\sigma(E)$ is the photo-electric cross-section (NOT including Thomson scattering). Note that this model uses the Anders & Ebihara relative abundances (1982) regardless of the abund command.

par1= $\eta_H$ equivalent hydrogen column (in units of $10^{22}$ atoms cm $^{-2}$ )

The zwabs variant allows the user to specify a (fixed) redshift parameter, and uses the corresponding formula

$\begin{displaymath} M(E)=\exp[-\eta_H\sigma(E[1+z])] \end{displaymath}$

par1= $\eta_H$ equivalent hydrogen column (in units of $10^{22}$ atoms cm $^{-2}$ )

par2=z redshift

par1= $\eta_H$	equivalent hydrogen column (in units of $10^{22}$ atoms cm $^{-2}$ )
par2=z	redshift