174 citations · 908 across the 19 of their papers we have counts for
3 papers · 1 filter
Observations of water with Herschel/HIFI toward the high-mass protostar AFGL 2591
Y. Choi, F. F. S. van der Tak, E. F. van Dishoeck +2
Water is a sensitive tracer of physical conditions in star-forming regions because of its large abundance variations between hot and cold regions. We use spectrally resolved observ…
A non-equilibrium ortho-to-para ratio of water in the Orion PDR
Y. Choi, F. F. S. van der Tak, E. A. Bergin +1
The ortho-to-para ratio (OPR) of HO is thought to be sensitive to the temperature of water formation. The OPR of HO is thus useful to study the formation mechanism of water…
Trigonometric Parallaxes of Star Forming Regions in the Perseus Spiral Arm
Y. K. Choi, K. Hachisuka, M. J. Reid +4
We report trigonometric parallaxes and proper motions of water masers for 12 massive star forming regions in the Perseus spiral arm of the Milky Way as part of the Bar and Spiral S…