ExoMol line lists. AlH : J/MNRAS/479/1401


Authors : Yurchenko S.N. orcid , Williams H., Leyland P.C. (hide) , Williams H., Leyland P.C. et..al

Bibcode : 2018MNRAS.479.1401Y (ADS) (Simbad) (Objects) (hide)
Data origin :

CDS Keywords : Atomic physics
UAT : Atomic physics

Model (MC)

Records :

Inserted into VizieR : 06-Nov-2018
Last modification : 18-Aug-2024

ExoMol line lists. XXVIII The rovibronic spectrum of AlH. (2018)

Keywords : molecular data, opacity - astronomical data bases miscellaneous - planets and satellites: atmospheres - stars: low-mass

Abstract:A new line list for AlH is produced. The WYLLoT line list spans two electronic states X^1^{SIGMA}^1^ and A^1^{PI}. A diabatic model is used to model the shallow potential energy curve of the A^1^{PI} state, which has a strong pre-dissociative character with only two bound vibrational states. Both potential energy curves are empirical and were obtained by fitting to experimentally derived energies of the X^1^{SIGMA}^1^ and A^1^{PI} electronic states using the diatomic nuclear motion codes Level and Duo. High temperature line lists plus partition functions and lifetimes for three isotopologues ^27^AlH, ^27^AlD and ^26^AlH were generated using ab initio dipole moments obtained with the MRCI/aug-cc-pV5Z level of theory. The line lists ...(more)
Abstract: (hide)
The data for each isotopologue of AlH are in two parts. The first, .states contain lists of rovibronic states. Each state is labelled with the total angular momentum, state degeneracy, life time, Zeeman Lande-g factor, total (+/-) and e/f parities, vibrational quantum number, projection of the electronic, spin and total angular momenta. Each state has a unique number, which is the number of the row in which it appears in the file. This number is the means by which the state is related to the second part of the data system, the transitions files. The transition files t_*.dat contain four columns: the reference number in the energy file of the upper state; that of the lower state; the Einstein A coefficient of the transition; the transition wavenumber. The pf*.dat files contain partition functions on a grid of 1K. ExoMol uses the HITRAN convention, where the nuclear statistical weights are included in the partition function as the corresponding functors.
S.N. Yurchenko, s.yurchenko(at)ucl.ac.uk J. Tennyson, j.tennyson(at)ucl.ac.uk

                
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