Molecular line opacity of LiCl in the mid-infrared spectra of brown dwarfs

@article{Weck2004MolecularLO,
  title={Molecular line opacity of LiCl in the mid-infrared spectra of brown dwarfs},
  author={Philippe F Weck and A. Schweitzer and K. Kirby and Peter Hauschildt and Phillip C Stancil},
  journal={arXiv: Astrophysics},
  year={2004}
}
We present a complete line list for the X 1Sigma+ electronic ground state of LiCl computed using fully quantum-mechanical techniques. This list includes transition energies and oscillator strengths in the spectral region 0.3-39,640.7 cm-1 for all allowed rovibrational transitions in absorption within the electronic ground state. The calculations were performed using an accurate hybrid potential constructed from a spectral inversion fit of experimental data and from recent multi-reference single… Expand

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References

SHOWING 1-10 OF 31 REFERENCES
The Molecular Line Opacity of MgH in Cool Stellar Atmospheres
A new, complete, theoretical rotational and vibrational line list for the A 2Π ← X 2Σ+ electronic transition in MgH is presented. The list includes transition energies and oscillator strengths forExpand
The Molecular Continuum Opacity of 24 MgH in Cool Stellar Atmospheres
The opacity due to photodissociation of 24MgH in the atmospheres of cool stars is investigated. The lowest two electronic transitions A 2Π ← X 2Σ+ and B' 2Σ+ ← X 2Σ+ are considered, where the crossExpand
Line Intensities and Molecular Opacities of the FeH F 4?i-X 4?i Transition
We calculate new line lists and opacities for the F 4 Di-X 4 Di transition of FeH. The 0-0 band of this transition is responsible for the Wing-Ford band seen in M-type stars, sunspots, and brownExpand
The Near-Infrared and Optical Spectra of Methane Dwarfs and Brown Dwarfs
We identify the pressure-broadened red wings of the saturated potassium resonance lines at 7700 A as the source of anomalous absorption seen in the near-infrared spectra of Gliese 229B and, byExpand
New CrH Opacities for the Study of L and Brown Dwarf Atmospheres
In this paper, we calculate new line lists and opacities for the 12 bands of the A 6þ X 6þ transitions of the CrH molecule. Identified in objects of the new L dwarf spectroscopic class (many of whichExpand
Spectroscopy of a Brown Dwarf Candidate in the alpha Persei Open Cluster
We report intermediate-resolution spectroscopy in the range 625-775 nm of a faint (R∼19) very late type object, discovered in two CCD images taken near the center of the α Per cluster. The spectrumExpand
New Theoretical Line List for the B′ 2Σ+←X 2Σ+ System of 24MgH
Fully quantum-mechanical techniques have been applied to compute the complete line list for the B' 2Σ+ ← X 2Σ+ system of 24MgH. The list includes transition energies and oscillator strengths over theExpand
Spherically Symmetric Model Atmospheres for Low-Mass Pre-Main-Sequence Stars with Effective Temperatures between 2000 and 6800 K
We present a grid of spherically symmetric model atmospheres for young pre-MS stars. This grid spans the parameter range 2000 K ≤ Teff ≤ 6800 K and 2.0 ≤ log g ≤ 3.5 for M = 0.1 M☉, appropriate forExpand
High-resolution infrared spectrum of the fundamental band of LiCl at a temperature of 830°C
Abstract High-resolution Fourier transform spectra of 6 LiCl and 7 LiCl have been recorded at 830°C. A total of 2522 lines have been measured at 0.006 cm −1 resolution in the 500- to 730-cm −1Expand
Theoretical study of the rovibrationally resolved transitions of CaH
Comprehensive absorption line lists for 40CaH have been calculated for electronic transitions from the X 2Σ+ ground state to the A 2Π, B/B′ 2Σ+, and E 2Π low-lying excited states. The lists includeExpand
...
1
2
3
4
...