An analysis of water line profiles in star formation regions observed by the Submillimeter Wave Astronomy Satellite
Publication Date
2000
Journal or Book Title
ASTROPHYSICAL JOURNAL
Abstract
We present spectral line profiles for the 557 GHz 110 → 101 ground-state rotational transition of ortho-H216O for 18 Galactic star formation regions observed by the Submillimeter Wave Astronomy Satellite. Water is unambiguously detected in every source. The line profiles exhibit a wide variety of shapes, including single-peaked spectra and self-reversed profiles. We interpret these profiles using a Monte Carlo code to model the radiative transport. The observed variations in the line profiles can be explained by variations in the relative strengths of the bulk flow and small-scale turbulent motions within the clouds. Bulk flow (infall, outflow) must be present in some cloud cores, and in certain cases this bulk flow dominates the turbulent motions.
DOI
https://doi.org/10.1086/312842
Pages
L115-L118
Volume
539
Issue
2
Recommended Citation
Ashby, MLN; Bergin, EA; Plume, R; Carpenter, JM; Neufeld, DA; Chin, G; Erickson, NR; Goldsmith, PF; Harwit, M; Howe, JE; Kleiner, SC; Koch, DG; Patten, BM; Schieder, R; Snell, Ronald L.; Stauffer, JR; Tolls, V; Wang, Z; Winnewisser, G; Zhang, YF; and Melnick, GJ, "An analysis of water line profiles in star formation regions observed by the Submillimeter Wave Astronomy Satellite" (2000). ASTROPHYSICAL JOURNAL. 636.
https://doi.org/10.1086/312842
Comments
The published version is located at http://iopscience.iop.org/1538-4357/539/2/L115