Collisional excitation of interstellar sulfur dioxide

Details Collisional excitation of interstellar sulfur dioxide Collisional excitation of interstellar sulfur dioxide

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apjs...64..565p&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 64, July 1987, p. 565-579.

Statistics

Computation

4

Helium Atoms, Interstellar Gas, Molecular Excitation, Molecular Rotation, Sulfur Dioxides, Computational Astrophysics, Intermolecular Forces

Scientific paper

State-to-state rotational excitation rates for the asymmetric top molecule SO2 in collisions with low-energy He atoms have been computed. The intermolecular forces were obtained from an electron gas model, and collision dynamics were treated with the finite-order sudden approximation. The total excitation rate is probably accurate to better than 50 percent; however, individual state-to-state rates may be in error by factors of 2 or 3, and some smaller rates may be accurate only to an order of magnitude. Present results are expected to reflect within the same level of accuracy rates for excitation by collisions with H2 molecules.

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