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Non-LTE Model Spectra for Gaseous Planetary Debris Disks around WDs

Published online by Cambridge University Press:  06 January 2014

Stephan Hartmann ,
Thorsten Nagel ,
Thomas Rauch  and
Klaus Werner
Stephan Hartmann
Affiliation:
Institute for Astronomy and Astrophysics, University of Tübingen, Germany email: hartmann@astro.uni-tuebingen.de
Thorsten Nagel
Affiliation:
Institute for Astronomy and Astrophysics, University of Tübingen, Germany email: hartmann@astro.uni-tuebingen.de
Thomas Rauch
Affiliation:
Institute for Astronomy and Astrophysics, University of Tübingen, Germany email: hartmann@astro.uni-tuebingen.de
Klaus Werner
Affiliation:
Institute for Astronomy and Astrophysics, University of Tübingen, Germany email: hartmann@astro.uni-tuebingen.de
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Abstract

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Metal-rich dust disks around white dwarfs are thought to be the debris of tidally disrupted rocky bodies. While normally the number of features to study the planetary material directly is very limited, ancillary gas disks around some of these white dwarfs provide the opportunity to do so. We used our Tübingen Accretion Disk code AcDc, assuming non-LTE conditions, to model the gaseous spectrum component. We investigated the chemical mixture as well as the surface density and effective temperature, and utilized the Ca ii infrared triplet to determine the geometry of the disk.

Keywords

accretion disks(stars:) white dwarfs(stars:) planetary systemsline: profilesradiative transfer
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S299: Exploring the Formation and Evolution of Planetary Systems , June 2013 , pp. 342 - 343
Copyright
Copyright © International Astronomical Union 2013 

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