... given by

Here and in the following we indicate a quantity Q as Q=10^x Q_x. We also adopt CGS units.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... radius

Note that if a clumpy medium is assumed instead of a spherical shell, $\eta_R$ is equal to the volume filling factor of the configuration that maximizes the emitted luminosity.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.

... luminosity

The continuum luminosity can be easily derived by adopting $\eta_{\rm {line}}=1$.

.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.