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Massive Protostars in a Protocluster -- A Multi-Scale ALMA View of G35.20-0.74N by Zhang, Yichen; Tanaka, Kei E. I.; Tan, Jonathan C.; Yang, Yao-Lun; Greco, Eva; Beltrán, Maria T.; Sakai, Nami; De Buizer, James M.; Rosero, Viviana; Fedriani, Rubén; Garay, Guido is a scholarly article available to read on EtoBox.

What is Massive Protostars in a Protocluster -- A Multi-Scale ALMA View of G35.20-0.74N about?

We present a detailed study of the massive star-forming region G35.2-0.74N with ALMA 1.3 mm multi-configuration observations. At 0.2" (440 au) resolution, the continuum emission reveals several dense cores along a filamentary structure, consistent with previous ALMA 0.85 mm observations. At 0.03" (66 au) resolution, we detect 22 compact sources, most of which are associated with the filament. Four of the sources are associated with compact centimeter continuum emission, and two of these are associated with H30{\alpha} recombination line emission. The H30{\alpha} line kinematics show ordered motion of the ionized gas, consistent with disk rotation and/or outflow expansion. We construct models of photoionized regions to simultaneously fit the multi-wavelength free-free fluxes and the H30{\alpha} total fluxes. The derived properties suggest the presence of at least three massive young stars with nascent hypercompact Hii regions. Two of these ionized regions are surrounded by a large rotating structure that feeds two individual disks, revealed by dense gas tracers, such as SO2, H2CO, and CH3OH. In particular, the SO2 emission highlights two spiral structures in one of the disks and pro

Author

Zhang, Yichen; Tanaka, Kei E. I.; Tan, Jonathan C.; Yang, Yao-Lun; Greco, Eva; Beltrán, Maria T.; Sakai, Nami; De Buizer, James M.; Rosero, Viviana; Fedriani, Rubén; Garay, Guido

Published

2022

Language

EN