Absorption Profiles of Li and Na in Brown Dwarf Spectra

Details Absorption Profiles of Li and Na in Brown Dwarf Spectra Absorption Profiles of Li and Na in Brown Dwarf Spectra

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...206.3205k&link_type=abstract

American Astronomical Society Meeting 206, #32.05; Bulletin of the American Astronomical Society, Vol. 37, p.481

Astronomy and Astrophysics

Astronomy

Scientific paper

An accurate determination of the complete profile including the extreme far wing is required to model the contribution of strong alkali resonance lines to brown dwarf spectra. A unified theory of collisional line profiles has been applied for the evaluation of the absorption coefficients of alkalis perturbed by helium and molecular hydrogen. Over a limited range of density and temperature, laboratory measurements can explore conditions that are similar to those in cool brown dwarf atmospheres, and can be used to validate the potentials which support the spectral line profile theory. Results are reported here for a study of the far wings of Li and Na.

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