A NEW MODIFIED-RATE APPROACH FOR GAS-GRAIN CHEMISTRY: COMPARISON WITH A UNIFIED LARGE-SCALE MONTE CARLO SIMULATION

Journal Article · Mon Jul 20 00:00:00 EDT 2009 · Astrophysical Journal (Online)

DOI:https://doi.org/10.1088/0004-637X/700/1/L43; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21313883

Garrod, R T ^[1]; Vasyunin, A I; Semenov, D A; Henning, Th ^[2]

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1. Department of Astronomy, Cornell University, Ithaca, NY 14853-6801 (United States)
2. Max Planck Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany)

We compare the results of the unified Monte Carlo chemical model with the new modified-rate equation (MRE) method under a wide range of interstellar conditions, using a full gas-grain chemical network. In most of the explored parameter space, the new MRE method reproduces very well the results of the exact approach. Small disagreements between the methods may be remedied by the use of a more complete surface chemistry network, appropriate to the full range of temperatures employed here.

• OSTI ID: 21313883
• Journal Information: Astrophysical Journal (Online), Vol. 700, Issue 1; Other Information: DOI: 10.1088/0004-637X/700/1/L43; Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-4357
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
ABUNDANCE
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COMPUTERIZED SIMULATION
MONTE CARLO METHOD
REACTION KINETICS