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9 papers
Kinematics of the Local Spiral Structure Revealed by Young Stars in \emph{Gaia}~DR3
Dejian Liu, Ye Xu, Chaojie Hao +4
Using young open clusters and O--B2-type stars in~\emph{Gaia}~DR3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral ar…
ALMA and VLBA views on the outflow associated with an O-type protostar in G26.50+0.28
Gang Wu, Christian Henkel, Ye Xu +6
Protostellar jets and outflows are essential ingredients of the star formation process. A better understanding of this phenomenon is important in its own right as well as for many…
A baseline correction algorithm for FAST
De-Jian Liu, Ye Xu, Ying-Jie Li +3
The Five-hundred-meter Aperture Spherical radio Telescope (FAST) is the most sensitive ground-based, single-dish radio telescope on Earth. However, the original HI spectra produced…
A comparison of the local spiral structure from Gaia DR2 and VLBI maser parallaxes
Y. Xu, S. B. Bian, M. J. Reid +8
Context. The Gaia mission has released the second data set (Gaia DR2), which contains parallaxes and proper motions for a large number of massive, young stars. Aims. We investigate…
Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
M. J. Reid, K. M. Menten, A. Brunthaler +13
Over 100 trigonometric parallaxes and proper motions for masers associated with young, high-mass stars have been measured with the BeSSeL Survey, a VLBA key science project, the EV…
Trigonometric Parallaxes of Massive Star-Forming Regions. IX. The Outer Arm in the First Quadrant
A. Sanna, M. J. Reid, T. M. Dame +5
We report a trigonometric parallax measurement with the Very Long Baseline Array for the water maser in the distant high-mass star-forming region G75.30+1.32. This source has a hel…
Trigonometric Parallaxes of Massive Star Forming Regions: VIII. G12.89+0.49, G15.03-0.68 (M17) and G27.36-0.16
Y. Xu, L. Moscadelli, M. J. Reid +4
We report trigonometric parallaxes for three massive star forming regions, corresponding to distances of kpc for G12.89+0.49 (also known as IRAS 18089-1732),…
Revising the kinematics of 12GHz CH3OH masers in W3(OH)
Luca Moscadelli, Ye Xu, Xi Chen
We derive accurate proper motions of the CH3OH 12 GHz masers towards the W3(OH) UCHII region, employing seven epochs of VLBA observations spanning a time interval of about 10 yr. T…
A Trigonometric Parallax of Sgr B2
M. J. Reid, K. M. Menten, X. W. Zheng +2
We have measured the positions of water masers in Sgr B2, a massive star forming region in the Galactic center, relative to an extragalactic radio source with the Very Long Baselin…