New rate coefficients of CS in collision with para- and ortho-H2 and astrophysical implications

Denis-Alpizar O.; Stoecklin T.; Guilloteau S.; Dutrey A.

dc.contributor.author	Denis-Alpizar O.
dc.contributor.author	Stoecklin T.
dc.contributor.author	Guilloteau S.
dc.contributor.author	Dutrey A.
dc.date.accessioned	2020-09-02T22:16:16Z
dc.date.available	2020-09-02T22:16:16Z
dc.date.issued	2018
dc.identifier	10.1093/mnras/sty1177
dc.identifier.citation	478, 2, 1811-1817
dc.identifier.issn	00358711
dc.identifier.uri	https://hdl.handle.net/20.500.12728/4262
dc.description	Astronomers use the CS molecule as a gas mass tracer in dense regions of the interstellar medium, to measure either the gas density through multiline observations or the level of turbulence. This necessarily requires the knowledge of the rates coefficients with the most common colliders in the interstellar medium, He and H2. In this work, the close coupling collisional rates are computed for the first 30 rotational states of CS in collision with paraand ortho-H2 using a recent rigid rotor potential energy surface. Some radiative transfer calculations, using typical astrophysical conditions, are also performed to test this new set of data and to compare with the existing ones. © 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.language.iso	en
dc.publisher	Oxford University Press
dc.subject	Astrochemistry
dc.subject	ISM: molecules
dc.subject	Molecular data
dc.subject	Molecular processes
dc.subject	Scattering
dc.title	New rate coefficients of CS in collision with para- and ortho-H2 and astrophysical implications
dc.type	Article