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Absolute measurements of state-to-state rotational energy transfer between CO and H2 at interstellar temperatures

Labiad, Hamza; Fournier, Martin; Mertens, Laura A.; Faure, Alexandre; Carty, David; Stoecklin, Thierry; Jankowski, Piotr; Szalewicz, Krzysztof; Le Picard, Sébastien D.; Sims, Ian R.

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Authors

Hamza Labiad

Martin Fournier

Laura A. Mertens

Alexandre Faure

Thierry Stoecklin

Piotr Jankowski

Krzysztof Szalewicz

Sébastien D. Le Picard

Ian R. Sims



Abstract

Experimental measurements and theoretical calculations of state-to-state rate coefficients for rotational energy transfer of CO in collision with H2 are reported at the very low temperatures prevailing in dense interstellar clouds (5–20 K). Detailed agreement between quantum state-selected experiments performed in cold supersonic flows using time-resolved infrared–vacuum-ultraviolet double-resonance spectroscopy and close-coupling quantum scattering calculations confirms the validity of the calculations for collisions between the two most abundant molecules in the interstellar medium.

Citation

Labiad, H., Fournier, M., Mertens, L. A., Faure, A., Carty, D., Stoecklin, T., …Sims, I. R. (2022). Absolute measurements of state-to-state rotational energy transfer between CO and H2 at interstellar temperatures. Physical Review A, 105(2), Article L020802. https://doi.org/10.1103/physreva.105.l020802

Journal Article Type Article
Acceptance Date Dec 21, 2021
Online Publication Date Feb 23, 2022
Publication Date 2022-02
Deposit Date Mar 17, 2022
Publicly Available Date Mar 28, 2024
Journal Physical Review A
Print ISSN 2469-9926
Electronic ISSN 2469-9934
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 105
Issue 2
Article Number L020802
DOI https://doi.org/10.1103/physreva.105.l020802
Related Public URLs https://arxiv.org/abs/2202.00342

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Published Journal Article (704 Kb)
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Copyright Statement
Reprinted with permission from the American Physical Society: Labiad, Hamza Fournier, Martin, Mertens, Laura A., Faure, Alexandre, Carty, David, Stoecklin, Thierry, Jankowski, Piotr, Szalewicz, Krzysztof, Le Picard, Sébastien D. & Sims, Ian R. (2022). Absolute measurements of state-to-state rotational energy transfer between CO and H2 at interstellar temperatures. Physical Review A 105(2): L020802. © (2022) by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.





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