 |
 |
Astron. Astrophys. 343, 1005-1008 (1999)
Rotational excitation of HD molecules by He atoms
E. Roueff and
C.J. Zeippen
UMR 8631 (associée au CNRS et à l'Université Paris 7) et DAEC, Observatoire de Paris, F-92195 Meudon, France
Received 2 December 1998 / Accepted 23 December 1998
Abstract
We present rate coefficients for rotational transitions induced in
collisions between HD and He. Rotational levels and kinetic
temperatures T ![[FORMULA]](img1.gif)
1000 K are considered.
The interaction potential surface calculated by Muchnick & Russek
(1994) has been used, together with the quantal coupled-channel method
for calculating the cross-sections. Very good agreement with previous
calculations by Schaefer (1990) is obtained. The present work goes
beyond the latter in that collision rates are calculated for all
available rotational levels below the first excited vibrational
level.
Key words: molecular
data 
molecular
processes
ISM: molecules
Send offprint requests to: E. Roueff
This article contains no SIMBAD objects.
Contents
- 1. Introduction
- 2. Numerical methods
- 3. Results
- 4. Discussion and conclusion
- Acknowledgements
- References
© European Southern Observatory (ESO) 1999
Online publication: March 1, 1999
helpdesk@link.springer.de