Collisional line profiles of rubidium and cesium perturbed by helium and molecular hydrogen

Details Collisional line profiles of rubidium and cesium perturbed by helium and molecular hydrogen Collisional line profiles of rubidium and cesium perturbed by helium and molecular hydrogen

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...452..351a&link_type=abstract

Astronomy and Astrophysics, Volume 452, Issue 1, 2006, pp.351-356

Astronomy and Astrophysics

Astrophysics

18

Line: Profiles, Radiation Mechanisms: General, Stars: Atmospheres, Stars: Low-Mass, Brown Dwarfs

Scientific paper

Previous calculations of the far wings of the potassium and sodium doublets in a unified-line shape semi-classical theory have been used recently to improve theoretical modeling of synthetic spectra of brown dwarfs. However the comparison with observations shows missing opacity in the 0.85 to 1.1 μm range. Contributions of other alkalis such as Rb I and Cs I may resolve this problem. We present new theoretical calculations of the line profiles of these two alkalis perturbed by helium and molecular hydrogen.

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