Non-linear astrochemical kinetics: theory and application Gwenaelle Dufour 1,2 S.B. Charnley 1 and J.E. Lindberg 1 1 Astrochemistry Laboratory, Code 691, NASA Goddard Space Flight Center, Greenbelt, MD 20771, USA, 2 Department of Physics, Catholic University of America, Washington, DC 20064, USA The systems of differential equations governing the kinetics of chemical reaction network scan exhibit a wide range of nonlinear dynamical phenomena: limit cycles, complex oscillations and chaos can all emerge from stable stationary solutions, subject to variation of externally controlled bifurcation parameters. One signpost of possible non-linear chemical kinetics is the presence of bistability in the stationary solutions of the associated system of differential equations. Furthermore, bistability is special as it indicates that a chemical evolution can develop incompletely different directions. To expand the understanding of chemical composition in space, it is important to characterize these processes theoretically. This work presents an overall description of
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