  We discuss the spectrum of scalar density perturbations from warm inflation
when the friction coefficient $\Gamma$ in the inflaton equation is dependent on
the inflaton field. The spectral index of scalar fluctuations depends on a new
slow-roll parameter constructed from $\Gamma$. A numerical integration of the
perturbation equations is performed for a model of warm inflation and gives a
good fit to the WMAP data for reasonable values of the model's parameters.

Astrophysics;High Energy Physics - Phenomenology