  In Active Galactic Nuclei (AGNs) the presence of a star cluster around the
central black hole can have several effects on the dynamics and the emission of
the global system. In this paper we analyze the interaction of stellar
atmospheres with a wind outflowing from the central region of the AGN nucleus.
Even a small mass loss from stars, as well as possible star collisions, can
give a non-negligible contribution in feeding matter into the AGN nuclear wind.
Moreover, stellar mass loss can produce envelopes surrounding stars that turn
out to be suitable for reproducing the observed emission from the Broad Line
Region (BLR). In this framework, the envelope can be confined by the bow shock
arising from the interaction between the expanding stellar atmosphere and the
AGN nuclear wind.
