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The D/H Ratio of Water Ice at Low Temperatures
Jeong-Eun Lee, Edwin A. Bergin
We present the modeling results of deuterium fractionation of water ice, H2, and the primary deuterium isotopologues of H3+ adopting physical conditions associated with the star an…
Herschel Far-Infrared Spectral-mapping of Orion BN/KL Outflows: Spatial distribution of excited CO, H2O, OH, O and C+ in shocked gas
Javier R. Goicoechea, Luis Chavarria, Jose Cernicharo +8
We present ~2'x2' spectral-maps of Orion BN/KL outflows taken with Herschel at ~12'' resolution. For the first time in the far-IR domain, we spatially resolve the emission associat…
13C-methyl formate: observations of a sample of high mass star-forming regions including Orion-KL and spectroscopic characterization
Cecile Favre, Miguel Carvajal, David Field +12
We have surveyed a sample of massive star-forming regions located over a range of distances from the Galactic centre for methyl formate, HCOOCH, and its isotopologues H$^{13}…
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…
Herschel HIFI observations of O toward Orion: special conditions for shock enhanced emission
Jo-Hsin Chen, Paul F. Goldsmith, Serena Viti +18
We report observations of molecular oxygen (O) rotational transitions at 487 GHz, 774 GHz, and 1121 GHz toward Orion Peak A. The O2 lines at 487 GHz and 774 GHz are detected at…
A PDR model for the FIR mid- CO ladder with universal rotational temperature in star forming region
Seokho Lee, Jeong-Eun Lee, Edwin A. Bergin +1
A photon dominated region (PDR) is one of the leading candidate mechanisms for the origin of the warm CO gas with near universal 300~K rotational temperature inferred from th…