Kinematics of gas and stars in the circumnuclear star-forming ring of NGC3351

G.F. HÄGELE, A.I. DÍAZ, M.V. CARDACI, E. TERLEVICH AND R. TERLEVICH

Granada, España

Workshop; V Workshop Estallidos de Formación Estelar en Galaxias: Star Formation and Metallicity; 2007

We present high spectral resolution (R ∼20000) observations in the blue and the far red of cicumnuclear star-forming regions (CNSFRs) in the circumnuclear star-forming ring of NGC3351 which have allowed the study of the kinematics of stars and ionized gas in these structures and, for the first time, the derivation of their dynamical masses. In some cases these regions, about 100 to 150 pc in size, are seen to be composed of several individual star clusters with much smaller sizes. The measured values of the stellar velocity dispersions yield dynamical masses of the order of 10^7solar masses for the whole CNSFRs.