Oscillations in Gas-grain Astrochemical Kinetics

Abstract

We have studied gas-grain chemical models of interstellar clouds to search for nonlinear dynamical evolution. A prescription is given for producing oscillatory solutions when a bistable solution exists in the gas-phase chemistry and we demonstrate the existence of limit cycle and relaxation oscillation solutions. As the autocatalytic chemical processes underlying these solutions are common to all models of interstellar chemistry, the occurrence of these solutions should be widespread. We briefly discuss the implications for interpreting molecular cloud composition with time-dependent models and some future directions for this approach.

arXiv comment9 pages, 3 figures, 1 table

References in corpus (23)

• Star Formation in the Milky Way and Nearby Galaxies
• Cold Dark Clouds: The Initial Conditions for Star Formation
• The UMIST database for astrochemistry 2012
• Star Formation Efficiencies and Lifetimes of Giant Molecular Clouds in the Milky Way
• Binding energies: new values and impact on the efficiency of chemical desorption
• Dust as interstellar catalyst I. Quantifying the chemical desorption process
• Binding energies of interstellar molecules on crystalline and amorphous models of water ice by ab-initio calculations
• Sensitivity analysis of grain surface chemistry to binding energies of ice species
• Isotopic Anomalies in Primitive Solar System Matter: Spin-state Dependent Fractionation of Nitrogen and Deuterium in Interstellar Clouds
• Reactive Desorption of CO Hydrogenation Products under Cold Pre-stellar Core Conditions
• Adsorption energies of carbon, nitrogen, and oxygen atoms on the low-temperature amorphous water ice: A systematic estimation from quantum chemistry calculations
• Efficiency of non-thermal desorptions in cold-core conditions. Testing the sputtering of grain mantles induced by cosmic rays
• Why does ammonia not freeze out in the center of pre-stellar cores?
• Atomic and Molecular Carbon as a Tracer of Translucent Clouds
• A New Determination of the Binding Energy of Atomic Oxygen on Dust Grain Surfaces: Experimental Results and Simulations
• Chemical sensitivity to the ratio of the cosmic-ray ionization rates of He and H2 in dense clouds
• Neural-Network Assisted Study of Nitrogen Atom Dynamics on Amorphous Solid Water. I. Adsorption & Desorption
• A Revised Description of the Cosmic Ray-Induced Desorption of Interstellar Ices
• Astrochemical modelling of infrared dark clouds
• Astrochemical Kinetic Grid Models of Groups of Observed Molecular Abundances: Taurus Molecular Cloud 1 (TMC-1)
• Sustained oscillations in Interstellar chemistry models
• Astrochemical Bistability: Autocatalysis in Oxygen Chemistry
• New Bistable Solutions in Molecular Cloud Chemistry: Nitrogen and Carbon Autocatalysis

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