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Excited Hydrogen Chemistry in Protostellar Outflows

Published online by Cambridge University Press:  07 August 2017

J.M.C. Rawlings ,
J.E. Drew  and
M. J. Barlow
J.M.C. Rawlings
Affiliation:
Department of Physics Nuclear Physics Laboratory Keble Road, Oxford OX1 3RH, UK
J.E. Drew
Affiliation:
Department of Physics Nuclear Physics Laboratory Keble Road, Oxford OX1 3RH, UK
M. J. Barlow
Affiliation:
Department of Physics and Astronomy University College London Gower street, London WC1E 6BT, UK

Abstract

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Chemical models of protostellar and other outflows have been reassessed in the light of new chemical data. In particular, reactions involving excited hydrogen (2s,p) are shown to be important in hot, dense outflows. The H(n=2) + H → H2 + hv reaction is much less of a contributor to the H2 formation rate than the recently measured H(n=2) + H → H2+ + e- reaction, providing conditions allow the 0.75eV endothermicity of this reaction to be overcome.

Type
Near Stellar Environments
Information
Symposium - International Astronomical Union , Volume 150: Astrochemistry of Cosmic Phenomena , 1992 , pp. 387 - 388
Copyright
Copyright © Kluwer 1992 

References

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