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Gas -phase chemical modeling. A + B → C + D. Model parameters : -Temperature (K) -Density (cm -3 ) -Elemental abundances UV, X-rays, cosmic-rays fields -Chemical networks. KIDA Kinetic database for Astrochemistry. Computation of the chemical abundances :
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Gas-phase chemical modeling A + B → C + D • Model parameters : • -Temperature (K) • -Density (cm-3) • -Elemental abundances • UV, X-rays, cosmic-rays fields • -Chemical networks KIDA Kinetic database for Astrochemistry Computation of the chemical abundances : dni/dt = kljnlnj - ni kijnj Production Destruction k : reaction rate coefficients A large community of French chemists and physicists, theoreticians and experimentalists are involved in the determination of accurate k (Bordeaux, Dijon, Montpellier, Paris, Rennes)