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17th European White Dwarf Workshop: Evolutionary status of RE J0317-853
Külebi, Baybars (2010)
Külebi B. "17th European White Dwarf Workshop: Evolutionary status of RE J0317-853.", timms video, Universität Tübingen (2010): https://timms.uni-tuebingen.de:443/tp/UT_20100817_002_eurowd_0001. Accessed 25 Jan 2021.
Külebi, B. (2010). 17th European White Dwarf Workshop: Evolutionary status of RE J0317-853. timms video: Universität Tübingen. Retrieved January 25, 2021 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20100817_002_eurowd_0001
Külebi, B. (2010). 17th European White Dwarf Workshop: Evolutionary status of RE J0317-853 [Online video]. 17 August. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20100817_002_eurowd_0001 (Accessed: 25 January 2021).
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title: 17th European White Dwarf Workshop: Evolutionary status of RE J0317-853
alt. title: 17th European White Dwarf Workshop - White dwarf structure and evolution
creator: Külebi, Baybars (author)
subjects: Astronomie, Physik, Astrophysik, Workshop, White Dwarf, evolutionary status, RE J0317-853, Baybars Külebi
description: 17th European White Dwarf Workshop, 16. bis 20. August 2010
abstract: Evolutionary status of RE J0317-853 (Baybars Külebi1, Stefan Jordan1, Ed Nelan2, Matt Burleigh3, Uli Bastian1, Martin Altmann1, Fabian Euchner4) (1Astronomisches Rechen-Institut, Mönchhofstr. 12-14, D-69120 Heidelberg, Germany, 2Space Telescope Science Institute, 3700 San Martin Dr, Baltimore, MD 21218, USA, 3Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK, 4Swiss Seismological Service, ETH Zurich, Sonneggstrasse 5, CH-8092 Zurich, Switzerland) REJ 0317-853 is an isolated magnetic white dwarf which is hot, highly magnetized and rapidly rotating relative to the rest of the magnetic white dwarf population. Due to the age discrepancy estimated by its hot nature and the colder counterpart LB9802, REJ 0317-853 was assumed to be a result of a binary merger. In this work we present the parallax measurements made by Hubble Space Telescope’s Fine Guidance System and the spectro-polarimetry from Anglo-Australian Observatory to reasses the evolutionary history of REJ 0317-853. Through the parallax measurement we determine the radius, mass and furthermore with the use of evolutionary models from the literature we estimate the cooling age. Additionally we modeled the phase resolved flux and polarization spectrum of REJ 0317-853 and our magnetic models are able to account for the formerly unexplained ~ %16 circular polarization feature. We also discuss the effect of different possibility of core composition and the effect of uncertainty in the temperature. The precise evolutionary history of REJ 0317-853 depends on the knowledge of the effective temperature. A single star progenitor is possible is we assume that the effective temperature is at the cooler end of the possible range from 30 000 to 50 000K; if Teff is rather at the hotter end, a binary merger scenario for REJ 0317-853 becomes more plausible.
publisher: ZDV Universität Tübingen
contributor: ZDV Universität Tübingen (producer)
creation date: 2010-08-17
dc type: image
localtype: video
identifier: UT_20100817_002_eurowd_0001
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?637472080120924468