%0 Book Section %T Theoretical approaches for studying Astrochemistry %+ Laboratoire Univers et Particules de Montpellier (LUPM) %A Talbi, Dahbia %Z LUPM:11-046 %B Chemistry in Astrophysical Media AstrOHP 2010 %E T. Pino and E. Dartois %I EDP sciences %P 02002 %8 2011-12-30 %D 2011 %R 10.1051/epjconf/20111802002 %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] %Z Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] %Z Chemical Sciences/Theoretical and/or physical chemistryBook sections %X The most popular ab initio theoretical approaches that are used to study the gas phase astrochemical reactivity are presented. The methods that are needed for the electronic calculation and the statistical approaches that are used for determining the rate coefficients are detailed %G English %L hal-00672051 %U https://hal.science/hal-00672051 %~ IN2P3 %~ CNRS %~ UNIV-MONTP2 %~ LUPM %~ MIPS %~ UNIV-MONTPELLIER %~ LUPM_AS %~ UM1-UM2