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17th European White Dwarf Workshop: On the evidence for planets orbiting the post-common envelope binary NN Ser
Dreizler, Stefan (2010)
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mla
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Dreizler S. "17th European White Dwarf Workshop: On the evidence for planets orbiting the post-common envelope binary NN Ser.", timms video, Universität Tübingen (2010): https://timms.uni-tuebingen.de:443/tp/UT_20100820_007_eurowd_0001. Accessed 30 Oct 2020.
apa
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Dreizler, S. (2010). 17th European White Dwarf Workshop: On the evidence for planets orbiting the post-common envelope binary NN Ser. timms video: Universität Tübingen. Retrieved October 30, 2020 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20100820_007_eurowd_0001
harvard
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Dreizler, S. (2010). 17th European White Dwarf Workshop: On the evidence for planets orbiting the post-common envelope binary NN Ser [Online video]. 20 August. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20100820_007_eurowd_0001 (Accessed: 30 October 2020).
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title: 17th European White Dwarf Workshop: On the evidence for planets orbiting the post-common envelope binary NN Ser
alt. title: 17th European White Dwarf Workshop - Disks, dust and planets around white dwarfs
creator: Dreizler, Stefan (author)
subjects: Astronomie, Physik, Astrophysik, Workshop, White Dwarf, planets, orbiting, post-common envelope binary NN Ser, Stefan Dreizler
description: 17th European White Dwarf Workshop, 16. bis 20. August 2010
abstract: On the evidence for planets orbiting the post-common envelope binary NN Ser (K. Beuermann(1), F. V. Hessman(1), S. Dreizler(1), T. R. Marsh(2), S. Parsons(2), V. S. Dhillon(3), M.R. Schreiber(4), D. E. Winget(5), and G. Miller(5)) ((1) Institut fur Astrophysik Goettingen, Georg-August-Universität, Friedrich-Hund-Platz 1, D-37077 Gottingen,Germany (2) Department of Physics, University of Warwick, Coventry, CV4 7AL,UK, (3) Department of Physics and Astronomy, University of Sheffield, S3 7RH, UK (4) Departamento de Fisica y Astronomia, Universidad de Valparaiso, Av. Gran Bretana 1111, Valparaiso, Chile, (5) Dept. of Astronomy, University of Texas at Austin, RLM 16.236, Austin, TX 78712, USA) Short-period eclipsing binaries have been subject to investigations for eclipse-time variations for decades. In case of the detection of period variations, different scenarios like apsidal motion, Applegate’s mechanism, loss of orbital momentum or a third body, have been discussed. Here, we present eclipse-time variations obtained from published and partly re-analysed as well as new high-precision mid-eclipse times of NN Ser obtained between 1988 and 2010. The periodicity reported by Qian et al. (2010) is not confirmed. Our new results are compared with the different scenarios. In case the period change is due to a third and potentially a fourth body, these two would be in the planetary mass regime. We therefore also discuss the question of first and second generation origin of these planetary candidates in this post-common envelope system.
publisher: ZDV Universität Tübingen
contributor: ZDV Universität Tübingen (producer)
creation date: 2010-08-20
dc type: image
localtype: video
identifier: UT_20100820_007_eurowd_0001
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?637396151282421565