Chemical anatomy of a massive star-forming region G33.92+0.11

Young Chol Minh & H. Baobab Liu (ASIAA)

Korea Astronomy & Space Science Institute

G33.92+0.11 is a massive star-cluster forming region at a distance of about 7 kpc. This source is at an early evolutionary stage with a nearly face-on projection. Recent ALMA observations at ~220 GHz reveal highly diverse chemical variations within the observed region of the source. Among the detected molecules, we focus on the emission properties from the highly saturated species related to the hot core near the star-forming regions, sulfur-bearing species related to the turbulence associated with stellar activities, and the SiO molecule related to the outflow shocks. This source is consisted of several distinct clumps having largely different chemical properties, which have resulted from the different evolutionary stages of star formation. Complicated features associated with star formation including the on-going accretion from ambient gas are investigated using the chemical tracers for specific physical conditions.

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