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Chemically fresh gas inflows detected in a nearby high-mass star-forming region


Chen, X and Ren, Z-Y and Li, D-L and Liu, T and Wang, K and Shen, Z-Q and Ellingsen, SP and Sobolev, AM and Mei, Y and Li, J-J and Wu, Y-F and Kim, K-T, Chemically fresh gas inflows detected in a nearby high-mass star-forming region, The Astrophysical Journal Letters, 923, (1) Article L20. ISSN 2041-8213 (2021) [Refereed Article]

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2021. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) licence. ( Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI

DOI: doi:10.3847/2041-8213/ac3ec8


We report the detection of a chemically fresh inflow that is feeding high-mass young-stellar-object (HMYSO) growth in the nearby high-mass star-forming region G352.63 made with both the Atacama Large Millimeter/submillimeter Array (ALMA) and the Submillimeter Array (SMA). High-quality images of the dust and molecular lines from both ALMA and SMA have consistently revealed a gravitationally controlled cold (∼10 K) gas inflow of chemically fresh molecules (e.g., CCH and HC3N) toward the central HMYSO and its surrounding dense gas structure, which has a possible torus- or disk-like morphology. The HMYSO is also observed to have an outflow, which is nearly perpendicular to the torus and its parental filament, and thus can be clearly separated from the inflows. These kinematic features provide observational evidence to support the conjecture that the infalling streamers in high-mass star-forming regions could proceed in a similar process to that observed in low-mass counterparts. The chemically fresh infalling streamers could also be involved in the disk or torus configuration, fragmentation, and accretion bursts that occur in both simulations and observations.

Item Details

Item Type:Refereed Article
Keywords:star formation, young stellar objects, interstellar clouds, interstellar medium, protostars, stellar accretion disks
Research Division:Physical Sciences
Research Group:Astronomical sciences
Research Field:Galactic astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the physical sciences
UTAS Author:Ellingsen, SP (Professor Simon Ellingsen)
ID Code:148273
Year Published:2021
Web of Science® Times Cited:1
Deposited By:Office of the School of Natural Sciences
Deposited On:2021-12-16
Last Modified:2022-01-18
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