Heidelberg 2015 – scientific programme
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MO: Fachverband Molekülphysik
MO 16: Posters 3: Novelties in Molecular Physics
MO 16.11: Poster
Wednesday, March 25, 2015, 17:00–19:00, C/Foyer
Computing and comparing different molecular paths which could lead to the formation of CCH− in the ISM — •Ibrokhim Iskandarov1, Fabio Carelli1, Franco A. Gianturco1,2, and Roland Wester1 — 1Institute for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria — 2Scuola Normale Superiore, Pisa, 56125, Italy
Among the most important addressed questions currently involving molecular anions in the Interstellar Medium (ISM), one which has been not yet fully answered relates how this species are produced in different astrophysical regions where specific environmental conditions are expected to be at play. Recent astrochemical models support the formation of large anionic carbon chains CnH− (n=4,6,8) [1] while between the smallest molecular anions observed, the CCH− has been only tentatively detected. We have thus undertaken an accurate theoretical and computational investigation on two specific interconnected mechanisms by which CCH−(X1Σg+) can be formed. Our computed rate coefficients for all the above, interconnected processes at the related environmental, local temperatures, shall be presented and discussed.
[1] F. Carelli, T. Grassi, M. Satta, F.A. Gianturco, ApJ 774, 97 (2013)