Abstract
We present the first PHOENIX (Hauschildt and Baron 1999) model atmosphere results for extreme exo-planets where we have coupled a detailed modeling of the alkali line profiles (Johnas et al. 2006) with non-equilibrium treatment of the chemically heterogeneous dust clouds (DRIFT) (Helling et al. 2007). Our investigation of the Na I D and KI lines show strong differences in shape and depth of the line profiles compared to commonly used impact approximated van der Waals profiles and a previously approximative dust treatment in PHOENIX. Such previous attempts of treating dust in phase equilibrium lead to a much stronger element, depletion of the atmospheric gas. Consequently, the modelling of dust formation processes does influence the spectral pseudo-continuum which is determined by the resonance absorption wings of the alkali lines.
Original language | English |
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Title of host publication | Extreme solar systems |
Subtitle of host publication | proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007 |
Editors | D Fischer, FA Rasio, SE Thorsett, A Wolszczan |
Place of Publication | San Francisco |
Publisher | Astronomical Society of the Pacific |
Pages | 393-396 |
Number of pages | 4 |
ISBN (Print) | 978-1-58381-666-0 |
Publication status | Published - 2008 |
Event | Conference on Extreme Solar Systems - Santorini Duration: 25 Jun 2007 → 29 Jun 2007 |
Conference
Conference | Conference on Extreme Solar Systems |
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City | Santorini |
Period | 25/06/07 → 29/06/07 |