wabs, zwabs: photoelectric absorption, Wisconsin cross-sections

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

$$M(E)=\exp[-\eta_H\sigma(E)]$$

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

$$M(E)=\exp[-\eta_H\sigma(E[1+z])]$$

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

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Last modified: Wednesday, 12-Mar-2025 17:05:25 EDT