Models of surface convection and dust clouds in brown dwarfs

Details Models of surface convection and dust clouds in brown dwarfs Models of surface convection and dust clouds in brown dwarfs

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008phst..133a4005f&link_type=abstract

Physica Scripta, Volume 133, Issue , pp. 014005 (2008).

Physics

Scientific paper

The influence of dust grains on the atmospheres of brown dwarfs is visible in observed spectra. To investigate what prevents the dust grains from falling down, or how fresh condensable material is mixed up in the atmosphere to allow new grains to form, we performed 2D radiation-hydrodynamics simulations with CO5BOLD of the upper part of the convection zone and the atmosphere containing the dust cloud layers. We find that unlike in models of Cepheids, the convective overshoot does not play a major role. Instead, the mixing in the dust clouds is controlled by gravity waves.

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