THE MAGNESIUM ISOTOPOLOGUES OF MgH IN THE A {sup 2}{Pi}-X {sup 2}{Sigma}{sup +} SYSTEM

Journal Article · Thu Aug 15 04:00:00 EDT 2013 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/207/2/26· OSTI ID:22140289

Hinkle, Kenneth H.; Wallace, Lloyd ^[1]; Ram, Ram S.; Bernath, Peter F. ^[2]; Sneden, Christopher ^[3]; Lucatello, Sara ^[4]

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1. National Optical Astronomy Observatories, P.O. Box 26732, Tucson, AZ 85726 (United States)
2. Department of Chemistry, University of York, Heslington, York YO10 5DD (United Kingdom)
3. Department of Astronomy, University of Texas at Austin, Austin, TX 78712 (United States)
4. INAF, Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova (Italy)

Using laboratory hollow cathode spectra we have identified lines of the less common magnesium isotopologues of MgH, {sup 25}MgH and {sup 26}MgH, in the A {sup 2}{Pi}-X {sup 2}{Sigma}{sup +} system. Based on the previous analysis of {sup 24}MgH, molecular lines have been measured and molecular constants derived for {sup 25}MgH and {sup 26}MgH. Term values and linelists, in both wavenumber and wavelength units, are presented. The A {sup 2}{Pi}-X {sup 2}{Sigma}{sup +} 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.

• OSTI ID: 22140289
• Journal Information: Astrophysical Journal, Supplement Series, Journal Name: Astrophysical Journal, Supplement Series Journal Issue: 2 Vol. 207; ISSN 0067-0049; ISSN APJSA2
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
ABUNDANCE
GALAXIES
HOLLOW CATHODES
HYDROGEN COMPOUNDS
MAGNESIUM 25
MAGNESIUM 26
MAGNESIUM COMPOUNDS
MAGNESIUM HYDRIDES
SPECTRA
STARS
SUNSPOTS