Expect the unexpected: non-equilibrium processes in brown dwarf atmospheres

Christiane Helling

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Brown Dwarf atmosphere are a chemically extremely rich, one example being the formation of clouds driven by the phase-non-equilibrium of the atmospheric gas. Cloud formation modelling is an integral part of any atmosphere simulation used to interpret spectral observations of ultra-cool objects and to determine fundamental parameters like log(g) and Teff. This proceeding to the workshop 'GAIA and the Unseen: The Brown Dwarf Question' first summarizes what a model atmosphere simulation is, and then advocates two ideas: A) The use of a multitude of model families to determine fundamental parameters with realistic confidence interval. B) To keep an eye on the unexpected, like for example, ionisation signatures resulting plasma processes
Original languageEnglish
Pages (from-to)695-698
JournalMemorie della Società Astronomica Italiana
Issue number4
Publication statusPublished - 17 Jul 2014
EventGaia and the unseen: The brown dwarf question. A GREAT-ESF workshop - Torino University, Rettorato, United States
Duration: 24 Mar 201426 Mar 2014


  • astro-ph.SR


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