Line strengths and updated molecular constants for the C2 Swan system
Abstract
New rotational line strengths for the C2 Swan system have been calculated for vibrational bands with v'=0-10 and v"=0-9, and J values up to J=34-96, based on previous observations in 30 vibrational bands. Line positions from several sources were combined with the results from recent deperturbation studies of the v'=4 and v'=6 states, and a weighted global least squares fit was performed. We report the updated molecular constants. The line strengths are based on a recent ab initio calculation of the transition dipole moment function. A line list has been made available, including observed and calculated line positions, Einstein A coefficients and oscillator strengths (f-values). The line list will be useful for astronomers and combustion scientists who utilize C2 Swan spectra. Einstein A coefficients and f-values were also calculated for the vibrational bands of the Swan system.
Keywords
Cite
@article{arxiv.1212.2102,
title = {Line strengths and updated molecular constants for the C2 Swan system},
author = {James S. A. Brooke and Peter F. Bernath and Timothy W. Schmidt and George B. Bacskay},
journal= {arXiv preprint arXiv:1212.2102},
year = {2015}
}
Comments
23 pages, 5 figures, submitted to JQSRT, new C2 Swan line list available at http://bernath.uwaterloo.ca/download/AutoIndex.php?dir=/C2/ (C2SwanLineList2012.txt); Changes for version 2 - typo in equations 4 and 5, line list updated due to typo in code causing f-values in line list to be calculated incorrectly (all other values in list, and all values in tables are correct)