INVESTIGADORES
HÄGELE Guillermo Federico
congresos y reuniones científicas
Título:
A comparative study of star formation processes in different environments
Autor/es:
G.F. HÄGELE, A.I. DÍAZ, E. TERLEVICH, E. PÉREZ-MONTERO, R. TERLEVICH, M.V. CARDACI AND M. CASTELLANOS
Lugar:
Madrid, España
Reunión:
Workshop; VII Workshop Estallidos de Formación Estelar en Galaxias: Formación de investigadores e impacto académico; 2009
Institución organizadora:
Universidad Autónoma de Madrid
Resumen:
   We present spectroscopy observations of circumnuclear star forming regions (CNSFR) in the galaxies: NGC 2903, NGC 3351 and NGC 3504, all of them of over solar metallicity according to standard empirical calibrations. Using data of moderate resolution (R~9000) a detailed determination of their abundances is made after careful subtraction of the very prominent underlying stellar absorption. It is found that most regions show the highest abundances in HII region-like objects. It is also shown that  CNSFR,  as a class, segregate from the disk HII region family, clustering around smaller eta values, and therefore higher ionizing temperatures.  High resolution (R~23000) data are used to map the velocity field in the central kpc of one of the galaxies, NGC3351, and to measure ionized gas (Heta) and stellar (Ca triplet) velocity dispersions for individual CNSFRs.