In this work we present an analysis of the circumstellar disk of one of the most observed Be stars, a Arae, based on the Viscous Decretion Disk paradigm. Our main objective is to demonstrate a circumstellar disk is sufficient to explain all the available observations, and to derive what are the physical properties of this disk. Our preliminary results suggest a disk with a moderate density (1.0 x 10(-13) cm(-3)) viewed at 45 deg. Furthermore, the modeling of SED, in particular in the UV domain, allowed us to revisit some of the stellar parameters listed in the literature.