IMPROVED LINE DATA FOR THE SWAN SYSTEM 12 C 13 C ISOTOPOLOGUE
Makaleler > Tam Makale · 2014
Yazarlar: Ram S. Ram, James S. A. Brooke, Peter F. Bernath, Christopher Sneden, Sara Lucatello
The Astrophysical Journal Supplement Series, Uluslararası, Wos, 2014, cilt 211, ss 5-5
DOI: 10.1088/0067-0049/211/1/5
Özet
We present new, accurate predictions for rotational line positions, excitation energies, and transition probabilities of the 12 C 13 C isotopologue Swan d 3 Π–a 3 Π system 0–0, 0−1, 0−2, 1−0, 1−1, 1−2, 2−0, 2−1, and 2−2 vibrational bands. The line positions and energy levels were predicted through new analyses of published laboratory data for the 12 C 13 C lines. Transition probabilities were derived from recent computations of transition dipole moments and related quantities. The 12 C 13 C line data were combined with similar data for 12 C 2, reported in a companion paper, and applied to produce synthetic spectra of carbon-rich metal-poor stars that have strong C 2 Swan bands. The matches between synthesized and observed spectra were used to estimate band head positions for a few of the 12 C 13 C vibrational bands and to verify that the new computed line data match observed spectra. The much weaker C 2 lines of the bright red giant Arcturus were also synthesized in the band head regions.