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The influence of convective energy transport on dust formation in brown dwarf atmospheres

Published online by Cambridge University Press:  01 August 2006

Matthias Dehn ,
Christiane Helling ,
Peter Woitke  and
Peter Hauschildt
Matthias Dehn
Affiliation:
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany email: mdehn@hs.uni-hamburg.de
Christiane Helling
Affiliation:
Research and Scientific Support Department ESTEC/ESA, PO Box 299, 2200 AG Noordwijk, The Netherlands
Peter Woitke
Affiliation:
Sterrewacht Leiden, PO Box 9513, 2300 RA Leiden, The Netherlands
Peter Hauschildt
Affiliation:
Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany email: mdehn@hs.uni-hamburg.de
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Convection is the main energy transport mechanism in brown dwarf atmospheres. The overshoot of ascending bubbles affects the upper and cooler region where dust formation can occur. In order to understand the observed presence of dust, the formation of grains and their gravitational settling must be balanced by up-mixing of condensible elements via convective overshoot. Otherwise, brown dwarf atmospheres would be completely dust-free (Woitke & Helling 2004).

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S239: Convection in Astrophysics , August 2006 , pp. 227 - 229
Copyright
Copyright © International Astronomical Union 2007

References

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