EDP Sciences
Free access
Volume 379, Number 2, November IV 2001
Page(s) 588 - 591
Section Diffuse matter in space
DOI http://dx.doi.org/10.1051/0004-6361:20011332

A&A 379, 588-591 (2001)
DOI: 10.1051/0004-6361:20011332

Further evidence for the assignment of the XCN band in astrophysical ice analogs to OCN-

Spectroscopy and deuterium shift
J. H. Novozamsky1, W. A. Schutte1 and J. V. Keane1, 2

1  Raymond and Beverly Sackler Laboratory for Astrophysics, Leiden Observatory, 2300 RA Leiden, The Netherlands
2  Kapteyn Astronomical Institute, PO Box 800, 9700 AV Groningen, The Netherlands

(Received 17 April 2001 / Accepted 20 September 2001 )

The $\rm\nu_3$ feature of the $\rm OCN^-$ ion near 2160 $\rm cm^{-1}$ which is produced by acid-base reactions in cryogenic HNCO/$\rm NH_3$ samples shows a small matrix induced deuterium shift. A similar shift is found for the "XCN" band near this position produced by photolysis of CO/$\rm NH_3$ ice. This agreement, together with the abundant evidence already in the literature, clearly demonstrates that the XCN feature can be assigned to $\rm OCN^-$.

Key words: methods: laboratory -- ISM: molecules -- infrared: ISM: lines and bands

Offprint request: W. Schutte, schutte@strw.leidenuniv.nl

© ESO 2001