The model has 4 parameters:
for
r
>
R
o
The line profile is calculated from:
Increasing
R
o
makes
lines broader; increasing
τ
*
makes them more
blueshifted and skewed.
R
o
=1.5
R
o
=3
R
o
=10
t
*
=
1,
2
,
4
where
