The edge model is absorption edge, given by.
|
|
1 |
|
|
where:
|
par1= |
threshold energy |
|
par2 |
absorption depth at the threshold |
The zedge model given by
|
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1 E < Ec |
|
|
allows a redshift z where:
|
par1 = Ec |
threshold energy |
|
par2= D |
absorption depth at threshold |
|
par3= z |
redshift |
![exp[-D*(E/E_c)^-3]](XSmodelEdge_files/image003.gif){kind=small}
![exp(-D*[E(1+z)/E_c]^3)](XSmodelEdge_files/image007.gif){kind=small}