Title

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.

Comments

The published version is located at http://iopscience.iop.org/1538-4357/539/2/L115

Volume

539

Pages

L115-L118

Issue

2

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