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    The Magnesium Isotopologues of MgH in the A(2)Pi-X-2 Sigma(+) System

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    2013_08_Hinkle.pdf (428.2Kb)
    Date
    2013-08
    Author
    Hinkle, Kenneth H.
    Wallace, Lloyd
    Ram, Ram S.
    Bernath, Peter F.
    Sneden, Christopher
    Lucatello, Sara
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    Abstract
    Using laboratory hollow cathode spectra we have identified lines of the less common magnesium isotopologues of MgH, (MgH)-Mg-25 and (MgH)-Mg-26, in the A(2)Pi-X-2 Sigma(+) system. Based on the previous analysis of (MgH)-Mg-24, molecular lines have been measured and molecular constants derived for (MgH)-Mg-25 and (MgH)-Mg-26. Term values and linelists, in both wavenumber and wavelength units, are presented. The A(2)Pi-X-2 Sigma(+) system of MgH is important for measuring the magnesium isotope ratios in stars. Examples of analysis using the new linelists to derive the Mg isotope ratio in a metal poor dwarf and giant are shown.
    Department
    Astronomy
    Subject
    molecular data
    stars: abundances
    stars: late-type
    sunspots
    isotopic abundance ratios
    cool stellar atmospheres
    hollow-cathode
    source
    metal-poor stars
    band strengths
    giant stars
    5865 nm
    lines
    spectrum
    nitrogen
    astronomy & astrophysics
    URI
    http://hdl.handle.net/2152/42943
    Citation
    Hinkle, Kenneth H., Lloyd Wallace, Ram S. Ram, Peter F. Bernath, Christopher Sneden, and Sara Lucatello. "The Magnesium Isotopologues of MgH in the A 2?-X 2?+ System." The Astrophysical Journal Supplement Series, Vol. 207, No. 2 (Aug., 2013): 26.
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