A partial covering fraction absorption. The relative abundances are set by the abund command.
where s(E) is the photo-electric cross-section (NOT including Thomson scattering) (see phabs) and:
|
par1= nH |
equivalent hydrogen column (in units of 1022 atoms cm–2) |
|
par2= f |
covering fraction |
The redshifted variant zpcfabs is given by:
![M(E) = n_H*exp[-f*sigma(E[1+z])] + 1 - f](XSmodelPcfabs_files/image003.gif){kind=small}
where s(E) is the photo-electric cross-section (NOT including Thomson scattering) (see phabs). Relative abundances are as for pcfabs. Parameters are:
|
par1= nH |
equivalent hydrogen column (in units of 1022 atoms cm–2) |
|
par2= f |
dimensionless covering fraction |
|
par3= z |
redshift |
