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    Improved Line Data for the Swan System (Cc)-C-12-C-13 Isotopologue

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    2014_03_Ram.pdf (638.2Kb)
    Date
    2014-03
    Author
    Ram, Ram S.
    Brooke, James S. A.
    Bernath, Peter F.
    Sneden, Christopher
    Lucatello, Sara
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    Abstract
    We present new, accurate predictions for rotational line positions, excitation energies, and transition probabilities of the (CC)-C-12-C-13 isotopologue Swan d(3)Pi-a(3)Pi 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 (CC)-C-12-C-13 lines. Transition probabilities were derived from recent computations of transition dipole moments and related quantities. The (CC)-C-12-C-13 line data were combined with similar data for C-12(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 (CC)-C-12-C-13 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.
    Department
    Astronomy
    Subject
    line: identification
    molecular data
    stars: abundances
    stars: carbon
    stars: individual (arcturus, he 0212-0557)
    metal-poor stars
    ballik-ramsay system
    fourier spectroscopy
    dissociation-energy
    c-13(2)
    bands
    c-2
    abundances
    spectra
    comets
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/42908
    Citation
    Ram, Ram S., James SA Brooke, Peter F. Bernath, Christopher Sneden, and Sara Lucatello. "Improved Line Data for the Swan System 12C13C Isotopologue." The Astrophysical Journal Supplement Series, Vol. 211, No. 1 (Mar., 2014): 5.
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