Einstein A-coefficients for vib-rotational transitions in CO

¹ Department of Physics, University of Gorakhpur, Gorakhpur 273 009, India
² Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, India

Send offprint request to: S. Chandra, School of Sciences, Indira Gandhi National Open University, New Delhi 110 068, India

Received: 18 May 1995
Accepted: 1 December 1995

Abstract

Einstein A-coefficients for vib-rotational transitions in CO isotopomers, for vibrational quantum number v up to 20, rotational quantum number J up to 140, and up to 4, are calculated. The change in J is governed by the selection rules . These coefficients play an important role in astronomy, as CO is the most abundant molecule after , and has been observed in almost all the astronomical objects.