Formation of CO+ by radiative association II

Document identifier: oai:DiVA.org:ltu-77537
Access full text here:10.1093/mnras/stz3641
Keyword: Natural Sciences, Annan fysik, Applied Physics, ISM: molecules, Supernovae: general, Radiation mechanisms: general, Molecular processes, Astrochemistry, Other Physics Topics, Physical Sciences, Atom- och molekylfysik och optik, Atom and Molecular Physics and Optics, Astronomi, astrofysik och kosmologi, Fysik, Naturvetenskap, Astronomy, Astrophysics and Cosmology, Tillämpad fysik
Publication year: 2020
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Abstract:

Radiative association of an oxygen atom with a carbon cation is investigated using quantal and semiclassical methods. The total rate coefficient for spontaneous radiative association of O(2s22p4, 3P) with C+(2s22p, 2P) on the doublet manifold is determined from the corresponding cross-sections. The cross-sections for the 12 Σ - → A2 II, 22 Σ - → A2II, and C2 Δ → A2II continuum-bound processes are calculated either semiclassically, in combination with the Breit-Wigner approach, or fully quantum mechanically. In the temperature range 10-10 000 K, our recommended total rate coefficient, obtained from these calculations and the data of Zámecniková et al. (2019), slowly increases from 7.5 × 10-18 cm3s-1 to 2.1 × 10-17 cm3s-1. Corresponding aspects of the CO+ and CO formations in SN 1987A are discussed

Authors

Martina Zámečníková

Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
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Magnus Gustafsson

Luleå tekniska universitet; Materialvetenskap; Tillämpad fysik
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Gunnar Nyman

Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg, Sweden
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Pavel Soldán

Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
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