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

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Chen, X, Ren, Z-Y, Li, D-L, Liu, T, Wang, K, Shen, Z-Q, Ellingsen, SP ORCID: 0000-0002-1363-5457, Sobolev, AM, Mei, Y, Li, J-J, Wu, Y-F and Kim, K-T 2021 , 'Chemically fresh gas inflows detected in a nearby high-mass star-forming region' , The Astrophysical Journal Letters, vol. 923, no. 1 , pp. 1-11 , doi: 10.3847/2041-8213/ac3ec8.

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Abstract

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 Type: Article
Authors/Creators: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
Keywords: star formation, young stellar objects, interstellar clouds, interstellar medium, protostars, stellar accretion disks
Journal or Publication Title: The Astrophysical Journal Letters
Publisher: Institute of Physics Publishing, Inc.
ISSN: 2041-8213
DOI / ID Number: 10.3847/2041-8213/ac3ec8
Copyright Information:

© 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. (https://creativecommons.org/licenses/by/4.0/) Any further distribution of this work must maintain attribution to the author(s) and the titleof the work, journal citation and DOI

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