Inelastic, exchange, and reactive processes in rovibrationally excited collisions of HD with H

ABSTRACT The HD molecule is an important coolant in early universe chemistry models and a tracer of H2 in star-forming regions. Rate coefficients for collisional excitation and de-excitation of HD rotational and vibrational levels form important ingredients in astrophysical models. While collisions...

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Published in:Monthly notices of the Royal Astronomical Society 2021-11, Vol.507 (4), p.6012-6019
Main Authors: Zhou, Boyi, Yang, Benhui, Balakrishnan, N, Kendrick, B K, Chen, Maodu, Stancil, P C
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cited_by cdi_FETCH-LOGICAL-c300t-2abae318919ee179bf36001a135fe14df38997b0c42367a9f1419e556d4dea3e3
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creator Zhou, Boyi
Yang, Benhui
Balakrishnan, N
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description ABSTRACT The HD molecule is an important coolant in early universe chemistry models and a tracer of H2 in star-forming regions. Rate coefficients for collisional excitation and de-excitation of HD rotational and vibrational levels form important ingredients in astrophysical models. While collisions with He, H2, and H are the most important, available data for H + HD collisions are largely limited to temperatures less than 1000 K for the vibrational ground state, low-lying rotational levels of the v = 1 HD vibrational level, or computed without reactive contributions. Here, through explicit quantum scattering calculations, we report extensive data for rovibrational transitions in HD induced by H atoms for a range of rotational levels in v = 1 and some v = 0 levels for temperatures up to 1000 K. The significance of the computed results for astrophysical modeling is discussed.
doi_str_mv 10.1093/mnras/stab2381
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title Inelastic, exchange, and reactive processes in rovibrationally excited collisions of HD with H
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