The Influence of Dust Formation Modelling on Na I and K I Line Profiles in Substellar Atmospheres

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.

arXiv comment5 pages, Accepted for publication in MNRAS

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• Dynamics of Dusty Vortices I: Extensions and limitations of the terminal velocity approximation
• Two substellar survivor candidates; one found and one missing
• Optical and Near-Infrared Spectroscopy of the L Subdwarf SDSS J125637.13-022452.4