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Detection of interstellar N2O: A new molecule containing an N-O bondA new interstellar molecule, N2O, known as nitrous oxide or 'laughing gas,' has been detected using the NRAO 12 m telescope. The J = 3 - 2, 4 - 3, 5 - 4, and 6 - 5 rotational transitions of this species at 75, 100, 125, and 150 GHz, respectively, were observed toward Sgr B2(M). The column density derived for N2O in this source is N(sub tot) approx. 10(exp 15)/sq. cm, which corresponds to a fractional abundance of approx. 10(exp -9), relative to H2. This value implies abundance ratios of N2O/NO approx. 0.1 and N2O/HNO approx. 3 in the Galactic center. Such ratios are in excellent agreement with predictions of ion-molecule models of interstellar chemistry using early-time calculations and primarily neutral-neutral reactions. N2O is the third interstellar molecule detected thus far containing an N-O bond. Such bonds cannot be so rare as previously thought.
Document ID
19950036374
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Ziurys, L. M. (Arizona State Univ. Tempe, AZ, United States)
Apponi, A. J. (Arizona State Univ. Tempe, AZ, United States)
Hollis, J. M. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Snyder, L. E. (Univ. of Illinois, Urbana, IL United States)
Date Acquired
August 16, 2013
Publication Date
December 1, 1994
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters
Volume: 436
Issue: 2
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NAGW-2299
CONTRACT_GRANT: NSF AST-92-53682
PROJECT: RTOP 188-44-21-05
Distribution Limits
Public
Copyright
Other