7 papers · 1 filter
An Infalling Torus of Molecular Gas Around the Ultra-Compact HII Region G28.20-0.05
Peter K. Sollins, Qizhou Zhang, Eric Keto +1
We present new observations of the ultra-compact HII region G28.20-0.05 in 23 GHz continuum, and the NH3(1,1), NH3(2.2), and NH3(3,3) lines. To explain the complicated kinematics o…
The Molecular Accretion Flow in G10.6-0.4
Peter K. Sollins, Paul T. P Ho
We have observed the ultracompact HII region G10.6-0.4 with the VLA in 23 GHz continuum and the NH3(3,3) inversion line. By analyzing the optical depth of the line as well as the k…
Spherical Infall in G10.6-0.4: Accretion Through an Ultracompact HII Region
Peter K. Sollins, Qizhou Zhang, Eric Keto +1
We present high resolution (0.''12 x 0.''079) observations of the ultracompact HII region G10.6-0.4 in 23 GHz radio continuum and the NH3(3,3) line. Our data show that the infall i…
Submillimeter Array multiline observations of the massive star-forming region IRAS 18089-1732
H. Beuther, Q. Zhang, T. R. Hunter +8
Submillimeter Array (SMA) observations of the high-mass star-forming region IRAS 18089-1732 in the 1 mm and 850 m band with 1 GHz bandwidth reveal a wealth of information. We pr…
Search for Calibrators for the Submillimeter Array: I. High-Mass Star Forming Regions
Y. -N. Su, S. -Y. Liu, J. Lim +8
We present initial results of an ongoing search for interferometric calibrators at submillimeter (sub-mm) wavelengths with the Submillimeter Array (SMA). Powerful radio galaxies ar…
Mapping the Outflow from G5.89-0.39 in SiO(5-4)
P. K. Sollins, T. R. Hunter, J. Battat +9
We have mapped the ultracompact HII region, G5.89-0.39, and its molecular surroundings with the Submillimeter Array at 2".8 x 1".8 angular resolution in 1.3 mm continuum, SiO(5-4),…