Abstract
This talk is based on the paper “Initial phases of high-mass star formation: A multiwavelength study towards the extended green object G12.42+0.50” by Namitha Issac, Anandmayee Tej, Tie Liu, Watson Varricatt, Sarita Vig, Ishwara Chandra CH and Mathias Schultheis and has been accepted for publication in MNRAS. A multiwavelength study of the extended green object G12.42+0.50 is presented. The associated ionized, dust, and molecular components of this source is probed using various observations at near- and far-infrared, submillimeter and radio wavelengths. The radio continuum emission mapped at 1390 and 610 MHz calls for a scenario of co-existence of an ultracompact (UC) H II region with an ionized jet possibly powered by the same young stellar object (YSO). Shock-excited lines of H2 and [Fe II] seen in the NIR spectra provide support to this picture. Study of the gas kinematics of the molecular cloud reveals the presence of both infall activity and large-scale molecular outflow, suggesting an early stage of massive star formation in G12.42+0.50.
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