The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets

C. M. S. Johnas; Christiane Helling; S. Witte; M. Dehn; Peter Woitke; P. H. Hauschildt

The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets

C. M. S. Johnas, Christiane Helling, S. Witte, M. Dehn, Peter Woitke, P. H. Hauschildt

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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
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
City	Santorini
Period	25/06/07 → 29/06/07

Cite this

Johnas, C. M. S., Helling, C., Witte, S., Dehn, M., Woitke, P., & Hauschildt, P. H. (2008). The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets. In D. Fischer, FA. Rasio, SE. Thorsett, & A. Wolszczan (Eds.), Extreme solar systems: proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007 (pp. 393-396). Astronomical Society of the Pacific.

Johnas, C. M. S. ; Helling, Christiane ; Witte, S. et al. / The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets. Extreme solar systems: proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007. editor / D Fischer ; FA Rasio ; SE Thorsett ; A Wolszczan. San Francisco : Astronomical Society of the Pacific, 2008. pp. 393-396

@inproceedings{35789bfae14745daa910f744b6e0d93a,

title = "The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets",

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.",

author = "Johnas, \{C. M. S.\} and Christiane Helling and S. Witte and M. Dehn and Peter Woitke and Hauschildt, \{P. H.\}",

year = "2008",

language = "English",

isbn = "978-1-58381-666-0",

pages = "393--396",

editor = "D Fischer and FA Rasio and SE Thorsett and A Wolszczan",

booktitle = "Extreme solar systems",

publisher = "Astronomical Society of the Pacific",

note = "Conference on Extreme Solar Systems ; Conference date: 25-06-2007 Through 29-06-2007",

}

Johnas, CMS, Helling, C, Witte, S, Dehn, M, Woitke, P & Hauschildt, PH 2008, The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets. in D Fischer, FA Rasio, SE Thorsett & A Wolszczan (eds), Extreme solar systems: proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007. Astronomical Society of the Pacific, San Francisco, pp. 393-396, Conference on Extreme Solar Systems, Santorini, 25/06/07.

The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets. / Johnas, C. M. S.; Helling, Christiane; Witte, S. et al.
Extreme solar systems: proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007. ed. / D Fischer; FA Rasio; SE Thorsett; A Wolszczan. San Francisco: Astronomical Society of the Pacific, 2008. p. 393-396.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets

AU - Johnas, C. M. S.

AU - Helling, Christiane

AU - Witte, S.

AU - Dehn, M.

AU - Woitke, Peter

AU - Hauschildt, P. H.

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

M3 - Conference contribution

SN - 978-1-58381-666-0

SP - 393

EP - 396

BT - Extreme solar systems

A2 - Fischer, D

A2 - Rasio, FA

A2 - Thorsett, SE

A2 - Wolszczan, A

PB - Astronomical Society of the Pacific

CY - San Francisco

T2 - Conference on Extreme Solar Systems

Y2 - 25 June 2007 through 29 June 2007

ER -

Johnas CMS, Helling C, Witte S, Dehn M, Woitke P, Hauschildt PH. The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets. In Fischer D, Rasio FA, Thorsett SE, Wolszczan A, editors, Extreme solar systems: proceedings of a conference held on Santorini Island, Greece, 25-29 June 2007. San Francisco: Astronomical Society of the Pacific. 2008. p. 393-396

The Consistent Modeling of Alkali Lines and Dust Formation in Extreme Exo-Planets

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