Star formation activity around Sh2-165 and Sh2-166

CICHOWOLSKI, S.; ORTEGA, M.E.; VASQUEZ, J; ROMERO, G.; CAPPA C. E.

Workshop; From Stars to Galaxies: Connecting our understanding of star and galaxy formation; 2010

Universidad de Florida

. Expanding HII regions have a huge impact on the morphology and dynamics of the surrounding interstellar medium. The star formation history in their environs is also affected by the influence of these regions.In this work, based on a multiwavelength study, we analyze the interstellar medium around the HII regions Sh2-165 and Sh2-166. Both HII regions are located at about 2-3 kpc, in the Perseus spiral arm, and are clearly detected in the optical and radio continuum images. They are partially bordered by  photodissociation regions and molecular gas. Using infrared point source catalogs (IRAS, MSX and 2MASS) we searched for young stellar object (YSO) candidates. We found an extensive ongoing star formation in both regions.On the other hand, given that Sh2-165 and Sh2-166 are located in the edge of the large HI shell created by the OB association Cas OB5, we analyzed the possible connection between the different structures.In this context, we investigate and compare the dynamical history and evolution of the HII regions.