Observations of Absorption by Water Vapor toward Sagittarius B2

Details Observations of Absorption by Water Vapor toward Sagittarius B2 Observations of Absorption by Water Vapor toward Sagittarius B2

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...539l.111n&link_type=abstract

The Astrophysical Journal, Volume 539, Issue 2, pp. L111-L113.

Astronomy and Astrophysics

Astronomy

36

Ism: Abundances, Ism: Clouds, Ism: Individual: Name: Sagittarius B2, Ism: Molecules, Radio Lines: Ism

Scientific paper

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.

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