The 13CO/C18O abundance ratio in the galactic star forming region W33

PARON, S.; ISEQUILLA, N.; AREAL, M. B. ; FARIÑA, C.; ORTEGA, M. E.

Congreso; XIV.0 Scientific Meeting (virtual) of the Spanish Astronomical Society; 2020

W33, located at a distance of 2.4 kpc, is a galactic high-mass star forming region, harboring many active clumps, OB stars, and H II regions. It is an appropriate region to study the interplay between the far ultraviolet (FUV) radiation and the dense molecular gas, which is useful to investigate the molecular cloud evolution and the star-forming processes that may occur within it. Using 12CO, 13CO, and C18O J=1-0 data obtained from the FOREST unbiased Galactic plane imaging survey performed with the Nobeyama 45 m telescope, we study the 13CO/C18O abundance ratio throughout the molecular cloud associated with W33 in relation to the radio continuum emission distribution and another tracers of the FUV radiation field.