CaltechAUTHORS
Published February 2022 | Version Accepted Version + Published
Journal Article Open

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

Creators

  • 1. ROR icon University of Rennes 1
  • 2. ROR icon California Institute of Technology
  • 3. ROR icon French National Centre for Scientific Research
  • 4. ROR icon Durham University
  • 5. ROR icon Institute of Molecular Sciences
  • 6. ROR icon Nicolaus Copernicus University
  • 7. ROR icon University of Delaware

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.

Additional Information

© 2022 American Physical Society. (Received 1 October 2020; accepted 21 December 2021; published 23 February 2022) This work was supported by the Agence Nationale de la Recherche (ANR-HYDRIDES), Contract No. ANR-12-BS05-0011-01, by the Région de Bretagne and the French National Programme "Physique et Chimie du Milieu Interstellaire" (PCMI) of CNRS/INSU with INC/INP cofunded by CEA and CNES. D.C. would like to thank the Université de Rennes 1 for support via the Visiting Professor programme. L.M. thanks Rennes Metropole for a mobility grant, and the Office for Science and Technology of the Embassy of France in the United States for a Chateaubriand Fellowship. This work was also supported in part by the National Science Foundation under Grant No. CHE-1900551. P.J. acknowledges support from the National Science Centre of Poland under Grant No. 2017/25/B/ST4/01300.

Attached Files

Published - PhysRevA.105.L020802.pdf

Accepted Version - 2202.00342.pdf

Files

2202.00342.pdf

Files (16.2 MB)

Name Size
md5:57f758bdb81c4ff2eb3303425dc458f1
15.5 MB Preview Download
md5:0f5f44db70845449b67249f19551794f
704.1 kB Preview Download

Additional details

Identifiers

Eprint ID
113542
Resolver ID
CaltechAUTHORS:20220223-919267000

Related works

Describes
10.1103/PhysRevA.105.L020802 (DOI)
https://arxiv.org/abs/2202.00342 (URL)

Funding

Agence Nationale pour la Recherche (ANR)
ANR-12-BS05-0011-01
Région de Bretagne
Physique et Chimie du Milieu Interstellaire (PCMI)
Centre National de la Recherche Scientifique (CNRS)
Commissariat a l'Energie Atomique (CEA)
Centre National d'Études Spatiales (CNES)
Université de Rennes 1
Rennes Metropole
Office for Science and Technology of the Embassy of France
NSF
CHE-1900551
National Science Centre (Poland)
2017/25/B/ST4/01300

Dates

Created
2022-02-24
Created from EPrint's datestamp field
Updated
2022-02-24
Created from EPrint's last_modified field