IR dust bubbles: molecular gas linked to S21, S22 and S23

C. E. CAPPA; J. VASQUEZ; GISELA A. ROMERO; M. RUBIO

Mar del Plata

Congreso; Reunión 55 de la Asociación Argentina de Astronomía; 2012

Asociación Argentina de Astronomía

Based on $^{12}$CO(2-1) and $^{13}$CO(2-1) line observations obtained with the APEX telescope, we investigate the molecular gas distribution in the environs of the infrared dust bubbles S,21, S,22, and S,23 identified by citet{churchwell+06}. This study allowed us to find molecular shells linked to the bubbles, and to estimate their distances, excitation conditions, masses, and ambient densities. A search for young stellar objets in IR point source catalogs applying specific criteria, revealed active areas of star formation coincident with the molecular envelope.