Detection of the 2165 inverse centimeter (4.619 micron) XCN band in the spectrum of L1551 IRS 5

Stephen C Tegler, David A. Weintraub, Louis J. Allamandola, Scott A. Sandford, Terrence W. Rettig, Humberto Campins

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Abstract

We report the detection of a broad absorption band at 2165 cm-1 (4.619 μm) in the spectrum of L1551 IRS 5. New laboratory results over the 2200-2100 cm-1 wavenumber interval (4.55-4.76 μm), 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 μm) and 2135 cm-1 (4.68 μm). The relative abundance of solid-state CO to frozen H2O is ∼0.13 while the abundance of XCN seems comparable to that of frozen CO.

Original languageEnglish (US)
Pages (from-to)260-265
Number of pages6
JournalAstrophysical Journal
Volume411
Issue number1
StatePublished - Jul 1 1993
Externally publishedYes

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Keywords

  • Infrared: interstellar: lines
  • ISM: individual (L 1551 1RS 5)
  • ISM: molecules
  • Line: identification

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Tegler, S. C., Weintraub, D. A., Allamandola, L. J., Sandford, S. A., Rettig, T. W., & Campins, H. (1993). Detection of the 2165 inverse centimeter (4.619 micron) XCN band in the spectrum of L1551 IRS 5. Astrophysical Journal, 411(1), 260-265.