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A comparison of laboratory spectra with a new theoretical study of potassium resonance lines perturbed by helium

Published online by Cambridge University Press:  13 February 2013

J.F. Kielkopf ,
N.F. Allard  and
J. Babb
J.F. Kielkopf
Affiliation:
Department of Physics and Astronomy, University of Louisville, Louisville, KY 40292, USA
N.F. Allard
Affiliation:
GEPI, Observatoire de Paris, 61 avenue de l’Observatoire, 75014 Paris, France Institut d’Astrophysique de Paris, UMR 7095, CNRS, Université Paris VI, 75014 Paris, France
J. Babb
Affiliation:
TAMP, Harvard-Smithsonian Center for Astrophysics, 60 Garden Sreet, Cambridge, Massachusetts 02138, USA

Abstract

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The optical spectra of L- and T-type dwarfs exhibit a continuum dominated by the far wings of the absorption profiles of the Na 3s-3p and K 4s-4p doublets perturbed by molecular hydrogen and helium. We examine the K resonance line wing and core with a unified line profile theory and compare to laboratory experiments and observations of the cool brown dwarf ϵ Indi Ba,b.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 58: ECLA - European Conference on Laboratory Astrophysics , 2012 , pp. 75 - 78
Copyright
© The Author(s) 2013

References

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