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17th European White Dwarf Workshop: HST/COS Spectroscopy of H1504+65
Werner, Klaus (2010)
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mla
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Werner K. "17th European White Dwarf Workshop: HST/COS Spectroscopy of H1504+65.", timms video, Universität Tübingen (2010): https://timms.uni-tuebingen.de:443/tp/UT_20100816_013_eurowd_0001. Accessed 23 Sep 2020.
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Werner, K. (2010). 17th European White Dwarf Workshop: HST/COS Spectroscopy of H1504+65. timms video: Universität Tübingen. Retrieved September 23, 2020 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20100816_013_eurowd_0001
harvard
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Werner, K. (2010). 17th European White Dwarf Workshop: HST/COS Spectroscopy of H1504+65 [Online video]. 16 August. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20100816_013_eurowd_0001 (Accessed: 23 September 2020).
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title: 17th European White Dwarf Workshop: HST/COS Spectroscopy of H1504+65
alt. title: 17th European White Dwarf Workshop - White dwarf structure and evolution
creator: Werner, Klaus (author)
subjects: Astronomie, Physik, Astrophysik, Workshop, White Dwarf, HST/COS Spectroscopy, H1504+65, Klaus Werner
description: 17th European White Dwarf Workshop, 16. bis 20. August 2010
abstract: HST/COS Spectroscopy of H1504+65 (K. Werner, T. Rauch) (Institute for Astronomy and Astrophysics, Kepler Center for Astro and Particle Physics, Eberhard Karls University, Tübingen, Germany) H1504+65 is the hottest known white dwarf (Teff =200,000 K). It has an extraordinary surface composition. The surface is devoid of hydrogen and helium. It is mainly composed of carbon and oxygen (by equal amounts) and neon (2-5%). We obviously see the exposed core of a former red giant. The evolutionary history of this unique object is unknown. Some time ago we have identified magnesium absorption lines in the soft X-ray photospheric Chandra spectrum, which suggests that H1504+65 may be an O-Ne-Mg white dwarf. It is our aim to test this hypothesis by an abundance determination of Mg from UV spectra taken with the HST Cosmic Origins Spectrograph. If confirmed, then H1504+65 would be the most compelling case for the existence of single O-Ne-Mg white dwarfs. We present first results of our on-going analysis.
publisher: ZDV Universität Tübingen
contributor: ZDV Universität Tübingen (producer)
creation date: 2010-08-16
dc type: image
localtype: video
identifier: UT_20100816_013_eurowd_0001
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?637364792209043177