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

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posted on 2023-05-21, 04:50 authored by Chen, X, Ren, Z-Y, Li, D-L, Liu, T, Wang, K, Shen, Z-Q, Simon EllingsenSimon Ellingsen, Sobolev, AM, Mei, Y, Li, J-J, Wu, Y-F, Kim, K-T
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.

History

Publication title

The Astrophysical Journal Letters

Volume

923

Article number

L20

Number

L20

Pagination

1-11

ISSN

2041-8213

Department/School

School of Natural Sciences

Publisher

Institute of Physics Publishing, Inc.

Place of publication

United Kingdom

Rights statement

© 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 title of the work, journal citation and DOI

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