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17th European White Dwarf Workshop: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs
Hartmann, Stephan (2010)
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mla
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Hartmann S. "17th European White Dwarf Workshop: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs.", timms video, Universität Tübingen (2010): https://timms.uni-tuebingen.de:443/tp/UT_20100820_004_eurowd_0001. Accessed 29 Oct 2020.
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Hartmann, S. (2010). 17th European White Dwarf Workshop: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs. timms video: Universität Tübingen. Retrieved October 29, 2020 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20100820_004_eurowd_0001
harvard
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Hartmann, S. (2010). 17th European White Dwarf Workshop: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs [Online video]. 20 August. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20100820_004_eurowd_0001 (Accessed: 29 October 2020).
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title: 17th European White Dwarf Workshop: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs
alt. title: 17th European White Dwarf Workshop - Disks, dust and planets around white dwarfs
creator: Hartmann, Stephan (author)
subjects: Astronomie, Physik, Astrophysik, Workshop, White Dwarf, asymmetric line profiles, spectra of gaseous metal disks, single DAZ white dwarfs, Stephan Hartmann
description: 17th European White Dwarf Workshop, 16. bis 20. August 2010
abstract: Asymmetric line profiles in the spectra of gaseous metal disks around single DAZ white dwarfs (Stephan Hartmann) (Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tübingen, Germany) Around several single DAZ and DBZ white dwarfs metal rich disks have been observed, which are mostly believed to originate from disruption of smaller rocky planetesimals. In some cases the material does not (only) form a dusty but gaseous disk. In the case of SDSS 1228+1040 the double peaked infrared Caii triplet 8498, 8542, 8662 Å, one of only two emission features of the spectra, exhibits a strong red/violet asymmetry. Assuming a composition similar to a chondrite-like asteroid, being the most prominent type in our own solar system, we calculated the spectrum and vertical structure of the disk using the T¨ubingen non-LTE Accretion Disk code AcDc. Modified to simulate different non axis-symmetrical disk geometries, the first preliminary results are in good agreement with the observed asymmetric line profile.
publisher: ZDV Universität Tübingen
contributor: ZDV Universität Tübingen (producer)
creation date: 2010-08-20
dc type: image
localtype: video
identifier: UT_20100820_004_eurowd_0001
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?637395732980667771