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Detection of the 2165 inverse centimeter (4.619 micron) XCN band in the spectrum of L1551 IRS 5
Authors:Tegler S C  Weintraub D A  Allamandola L J  Sandford S A  Rettig T W  Campins H
Institution:Department of Physics and Astronomy, University of Notre Dame, IN, 46556, USA.
Abstract:We report the detection of a broad absorption band at 2165 cm-1 (4.619 microns) in the spectrum of L1551 IRS 5. New laboratory results over the 2200-2100 cm-1 wavenumber interval (4.55-4.76 microns), performed with realistic interstellar ice analogs, suggest that this feature is due to a CN-containing compound. We will refer to this compound as XCN. We also confirm the presence of frozen CO (both in nonpolar and polar matrices) through absorption bands at 2140 cm-1 (4.67 microns) and 2135 cm-1 (4.68 microns). The relative abundance of solid-state CO to frozen H2O is approximately 0.13 while the abundance of XCN seems comparable to that of frozen CO.
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