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Hydrocarbons, Ices, and “XCN” in the Line of Sight toward the Galactic Center

Authors
Type
Published Article
Journal
The Astrophysical Journal
Publisher
American Astronomical Society
Publication Date
Apr 30, 2002
Volume
570
Issue
1
Pages
198–198
Source
SETI Institute
License
Unknown

Abstract

We discuss 2.8-3.9 μm spectra from the United Kingdom Infrared Telescope of seven sight lines toward IR sources near Sagittarius A* in the Galactic center (GC). In all lines of sight, the 3.0 μm H 2 O ice feature is present with optical depths in the range 0.33- 1.52. By constructing a simple ice model, we show that the ice profile is not fully accounted for by pure H 2 O ice mantles. Residual absorption is present at 2.95 and 3.2-3.6 μm. Aliphatic hydrocarbon absorption at 3.4 μm is shown to vary by a factor of 1.7, indicating ...

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