Open AccessQuenching of interstellar carbenes: Interaction of C3H2 with He and H2
Author(s) -
M. Ben Khalifa,
E. Sahnoun,
Laurent Wiesenfeld,
F Khadri,
K. Hammami,
Olivier Dulieu
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1412/13/132048
Subject(s) - quenching (fluorescence) , excited state , interstellar medium , galaxy , physics , molecule , collision , diatomic molecule , atomic physics , order (exchange) , projectile , abundance (ecology) , chemistry , astrophysics , quantum mechanics , computer science , fluorescence , computer security , finance , economics , fishery , biology
Synopsis C 3 H 2 molecules are ubiquitous in the Galaxy and present important challenges in their chemistry, whether cyclic or linear, and possibly substituted with D. Obtaining theoretical rotational quenching rates by collisions with He and H 2 as projectiles is of great importance in order to get quantitative abundance estimates. It is all the more challenging that many rotational lines are excited during the collision, resulting in computationnally very heavy quantum dynamics. The quality of various approximations will be discussed, as well as the quenching rates for astrophysical applications.