Millimeter and far-IR study of the IRCD SDC 341.232-0.268

VAZZANO, MERCEDES; C. E. CAPPA; FIRPO, V.; LOPEZ-CARVALLO, C.H.; RUBIO, M.; DURONEA, N.U.

REV. MEX. ASTRON. ASTR.

Instituto de Astronomia, Universidad Autonoma de Mexico

Año: 2019 vol. 55 p. 289 - 303

1405-2059

We analyze the molecular gas and dust associated with the infrared dark cloud SDC 341.232-0.268 in order to investigate the characteristics and parameters of the gas, determine the evolutionary status of four embedded EGO candidates and establish possible infall or outflow gas motions. We based our study on 12CO(2-1), 13CO(2-1), and C18O(2-1) data obtained with the APEX telescope, molecular data of high density tracers from the MALT90 survey and IR images from Spitzer, Herschel and ATLASGAL. The study reveals two clumps at -44 km/s towards the IRDC, with densities of > 104 cm−3 , typical of IRDCs, while high density tracers show H2 densities > 105 . FIR images reveals the presence of cold dust linked to the molecular clumps and EGOs. A comparison of spectra of the optically thin and optically thick molecular lines towards the EGOs suggests the existence of infall and outflow motions.