Title

Observations of absorption by water vapor toward Sagittarius B2

Publication Date

2000

Journal or Book Title

ASTROPHYSICAL JOURNAL

Abstract

We have observed the 110-101 pure rotational transitions of both H216O and H218O toward Sagittarius B2 using the Submillimeter Wave Astronomy Satellite. The spectra thereby obtained show a complex pattern of absorption and—in the case of H216O—emission, with numerous features covering a wide range of LSR velocities (-130 to 130 km s-1) and representing absorption both in gas associated with Sgr B2 as well as by several components of foreground gas along the line of sight. The ortho-water abundance derived for the absorbing foreground gas is ~6 × 10-7 relative to H2.

Comments

The published version is located at http://iopscience.iop.org/1538-4357/539/2/L111

Volume

539

Pages

L111-L113

Issue

2

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