Atlas of CMFGEN Models for OB Massive Stars

We present an atlas of 173 synthetic spectra of stars, with mass from 9 to 120 M⊙, covering the region of the OB main sequence stars in the H-R diagram. The spectra were calculated with the stellar atmosphere code CMFGEN, assuming solar metallicity in the ZAMS. In order to study the effect of rotation on the chemical composition of the stellar atmosphere, we calculated two sets of models: with metallicity changed by rotation when the star evolves and maintaining solar metallicity throughout the same evolutionary track. For each model, we calculated its synthetic spectra in the UV (900-2000 Å), optical (3500-7000 Å), and near IR (10,000-30,000 Å). We show the utility of this atlas, obtaining preliminary models for three stars in the field of the VVVCL086 cluster, comparing their IR observed spectra with the ones of the atlas. This process was done in a few hours, while the standard procedure to obtain such models could take several weeks.