The Parallax and 3D Kinematics of Water Masers in the Massive Star-forming Region G034.43+0.24
Journal
Date Issued
2023
Author(s)
Mai, Xiaofeng
•
Zhang, Bo
•
Reid, M. J.
•
•
Xu, Shuangjing
•
Sun, Yan
•
Zhang, Jingdong
•
Chen, Wen
•
Wen, Shiming
•
Luo, Qiuyi
•
Menten, Karl M.
•
Zheng, Xingwu
•
Brunthaler, Andreas
•
Xu, Ye
•
Wang, Guangli
Abstract
We report a measurement of the trigonometric parallax of 22 GHz water masers in the massive star-forming region G034.43+0.24 as part of the Bar and Spiral Structure Legacy Survey using the Very Long Baseline Array. The parallax is 0.330 ± 0.018 mas, corresponding to a distance of ${3.03}_{-0.16}^{+0.17}$ kpc. This locates G034.43+0.24 near the inner edge of the Sagittarius spiral arm and at one end of a linear distribution of massive young stars that cross nearly the full width of the arm. The measured three-dimensional motion of G034.43+0.24 indicates a near-circular Galactic orbit. The water masers display arc-like distributions, possibly bow shocks, associated with winds from one or more massive young stars.
Volume
949
Issue
1
Start page
10
Issn Identifier
0004-637X
Ads BibCode
2023ApJ...949...10M
Rights
open.access
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