Einstein A coefficients for rovibronic lines of the A 2 → X 2Σ+ and B' 2Σ+→ X 2 Σ+ transitions of MgH

被引:44
作者
GharibNezhad, Ehsan [1 ]
Shayesteh, Alireza [1 ]
Bernath, Peter F. [2 ]
机构
[1] Univ Tehran, Coll Sci, Sch Chem, Tehran 14176, Iran
[2] Old Dominion Univ, Dept Chem & Biochem, Norfolk, VA 23529 USA
关键词
molecular data; stars: late-type; subdwarfs; LYING ELECTRONIC STATES; ISOTOPIC ABUNDANCES; MAGNESIUM HYDRIDE; EMISSION-SPECTRA; GROUND-STATE; GIANT STARS; INTENSITIES; IONIZATION; ARCTURUS; SYSTEMS;
D O I
10.1093/mnras/stt510
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Einstein A coefficients have been calculated for rovibronic lines of the A (2) -> X (2)Sigma(+) and B-' (2)Sigma(+) -> X (2)Sigma(+) transitions of (MgH)-Mg-24. Using the experimentally determined analytic potential energy curve for the X (2)Sigma(+)state, and the Rydberg-Klein-Rees potentials for the A (2) and B-' (2)Sigma(+)states, combined with the most recent ab initio transition dipole moments, rovibronic transition moments were computed. The rovibronic transition frequencies were obtained accurately by subtracting the published term values of the X (2)Sigma(+), A (2) and B-' (2)Sigma(+) states. Using the rovibronic transition dipole moments, transition frequencies and the Honl-London factors, the Einstein A coefficients were calculated individually for similar to 30 000 rovibronic lines of the A (2) -> X (2)Sigma(+) and B-' (2)Sigma(+) -> X (2)Sigma(+) transitions of (MgH)-Mg-24.
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页码:2043 / 2047
页数:5
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