The influence of dust formation modelling on Na i and K i line profiles in substellar atmospheres

Authors :: C. M. S. Johnas
Ch. Helling
M. Dehn
P. Woitke
P. H. Hauschildt
Source :: Monthly Notices of the Royal Astronomical Society: Letters. 385:L120-L124
Publication Year :: 2008
Publisher :: Oxford University Press (OUP), 2008.
Abstract: We aim to understand the correlation between cloud formation and alkali line formation in substellar atmospheres.We perform line profile calculations for Na I and K I based on the coupling of our kinetic model for the formation and composition of dust grains with 1D radiative transfer calculations in atmosphere models for brown dwarfs and giant gas planets. The Na I and K I line profiles sensibly depend on the way clouds are treated in substellar atmosphere simulations. The kinetic dust formation model results in the highest pseudo-continuum compared to the limiting cases.<br />Comment: 5 pages, Accepted for publication in MNRAS

Subjects :: Physics
Kinetic model
Gas giant
Astrophysics (astro-ph)
Brown dwarf
FOS: Physical sciences
Astronomy and Astrophysics
Astrophysics
Alkali metal
Kinetic energy
Atmosphere
Space and Planetary Science
Radiative transfer
Astrophysics::Solar and Stellar Astrophysics
Astrophysics::Earth and Planetary Astrophysics
Astrophysics::Galaxy Astrophysics
Line (formation)

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