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High-mass star formation in the nearby region G352.630-1.067. I. parallax


Chen, X and Li, J-J and Zhang, B and Ellingsen, SP and Xu, Y and Ren, Z-Y and Shen, Z-Q and Sobolev, AM, High-mass star formation in the nearby region G352.630-1.067. I. parallax, Astrophysical Journal, 871, (2) Article 198. ISSN 0004-637X (2019) [Refereed Article]


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Copyright 2019 The American Astronomical Society Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0)

DOI: doi:10.3847/1538-4357/aaf862


Young or forming high-mass stars that are nearby and not within a cluster environment have the potential to provide fundamental insights into star formation. In this paper we report such a candidate (G352.630-1.067), for which we have measured the distance through very long baseline interferometry parallax observations of the associated 6.7 GHz class II methanol maser. We determine the distance to the source to be 0.69+0.10-0.08 kpc, which makes it the second nearest high-mass star formation region (HMSFR) known, with only the Orion Nebula being closer. This may place this source, not within a Galactic spiral arm, but in the region between the Local and Sagittarius arms, indicating that molecular clouds in interarm regions may also generate high-mass stars. Kinematic association between this source and the Sagittarius Arm suggests that it may be located in a spur extending outward from this arm. Comparison with the known, nearby HMSFRs (distances less than 1 kpc), reveal that G352.630-1.067 is in a more isolated environment than others, hence providing an excellent candidate for investigations of the processes that form individual high-mass stars. We find a good spatial correlation between the 6.7 GHz methanol maser and high angular resolution images of the infrared outflow, suggesting that the class II methanol masers are closely associated with a jet/outflow in this source.

Item Details

Item Type:Refereed Article
Keywords:Galaxy: structure; masers; parallaxes; stars: formation
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:130648
Year Published:2019
Funding Support:Australian Research Council (DP180101061)
Web of Science® Times Cited:3
Deposited By:Mathematics and Physics
Deposited On:2019-02-06
Last Modified:2020-05-20
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