Astron. Astrophys. Suppl. Ser. 131, 137-139

Einstein A-coefficients for rotational transitions in the ground vibrational state of ²⁸SiC₂, ²⁹SiC₂ and ³⁰SiC₂

S. Chandra and Rashmi

School of Sciences, Indira Gandhi National Open University, New Delhi 110 068, India

Received September 23, 1997; accepted January 27, 1998

Abstract:

Einstein A-coefficients for the electric dipole transitions in Silicon Dicarbide molecule and its isotopomers between rotational levels of the ground vibrational state up to 51 cm^-1 are calculated. These coefficients are used for computing radiative life times of the levels. The A-coefficients are one of the important input parameters for the radiative transfer calculations.

Key words: molecular data -- ISM: molecules -- radio lines: stars -- stars: IRC + 10216