GAS-GRAIN MODELING OF ISOCYANIC ACID (HNCO), CYANIC ACID (HOCN), FULMINIC ACID (HCNO), AND ISOFULMINIC ACID (HONC) IN ASSORTED INTERSTELLAR ENVIRONMENTS

Journal Article · Mon Dec 20 04:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/725/2/2101· OSTI ID:21476666

Donghui, Quan ^[1]; Herbst, Eric ^[2]; Osamura, Yoshihiro ^[3]; Roueff, Evelyne ^[4]

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1. Chemical Physics Program, Ohio State University, Columbus, OH 43210 (United States)
2. Departments of Physics, Astronomy, and Chemistry, Ohio State University, Columbus, OH 43210 (United States)
3. Kanagawa Institute of Technology, Atsugi 243-0292 (Japan)
4. Observatoire de Paris-Meudon, LUTH UMR 8102, du CNRS and Universite Denis Diderot 5 Place Jules Janssen, F-92195 Meudon Cedex (France)

Isocyanic acid (HNCO) is a well-known interstellar molecule. Evidence also exists for the presence of two of its metastable isomers in the interstellar medium: HCNO (fulminic acid) and HOCN (cyanic acid). Fulminic acid has been detected toward cold and lukewarm sources, while cyanic acid has been detected both in these sources and in warm sources in the Galactic Center. Gas-phase models can reproduce the abundances of the isomers in cold sources, but overproduce HCNO in the Galactic Center. Here we present a detailed study of a gas-grain model that contains these three isomers, plus a fourth isomer, isofulminic acid (HONC), for four types of sources: hot cores, the warm envelopes of hot cores, lukewarm corinos, and cold cores. The current model is partially able to rationalize the abundances of HNCO, HOCN, and HCNO in cold and warm sources. Predictions for HONC in all environments are also made.

• OSTI ID: 21476666
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 725; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
ASTROPHYSICS
CARBONIC ACID DERIVATIVES
ISOCYANATES
ISOMERS
NITROGEN COMPOUNDS
ORGANIC COMPOUNDS
PHYSICS
SIMULATION