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17th European White Dwarf Workshop: Constraints on progenitors of Classical Novae
Bogdán, Ákos (2010)
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mla
clipboard		 Bogdán Á. "17th European White Dwarf Workshop: Constraints on progenitors of Classical Novae.", timms video, Universität Tübingen (2010): https://timms.uni-tuebingen.de:443/tp/UT_20100818_006_eurowd_0001. Accessed 23 Nov 2024.
apa
clipboard		 Bogdán, Á. (2010). 17th European White Dwarf Workshop: Constraints on progenitors of Classical Novae. timms video: Universität Tübingen. Retrieved November 23, 2024 from the World Wide Web https://timms.uni-tuebingen.de:443/tp/UT_20100818_006_eurowd_0001
harvard
clipboard		 Bogdán, Á. (2010). 17th European White Dwarf Workshop: Constraints on progenitors of Classical Novae [Online video]. 18 August. Available at: https://timms.uni-tuebingen.de:443/tp/UT_20100818_006_eurowd_0001 (Accessed: 23 November 2024).
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title: 17th European White Dwarf Workshop: Constraints on progenitors of Classical Novae
alt. title: 17th European White Dwarf Workshop - White dwarfs in novae and CVs
creator: Bogdán, Ákos (author)
subjects: Astronomie, Physik, Astrophysik, Workshop, White Dwarf, progenitors, Classical Novae, Ákos Bogdán
description: 17th European White Dwarf Workshop, 16. bis 20. August 2010
abstract: Constraints on progenitors of Classical Novae (Á. Bogdán1 and M. Gilfanov1,2) (1Max-Planck-Institut f¨ur Astrophysik, Karl-Schwarzschild-Str.1, 85741 Garching bei München, Germany, 2Space Research Institute, Russian Academy of Sciences, Profsoyuznaya 84/32, 117997 Moscow, Russia) We derive constraints on the nature of progenitors of Classical Novae (CNe). CNe are nuclear explosions occuring upon accumulation of certain amount of hydrogen-rich material on the surface of an accreting white dwarf in a close binary system. The accretion energy is released in the optical, ultraviolet, or X-ray wavelengths, depending on the type of the progenitor system. In magnetic systems (polars and intermediate polars) and dwarf novae in quiescence it is mainly emitted in the X-ray regime. Based on the CN rate in the bulge of M31 and its X-ray surface brightness, we show that no more than ~10% of CNe can be produced in magnetic cataclysmic variables, the upper limit being ~3% for parameters typical for CN progenitors. In dwarf novae, at least ~90 - 95% of the material must be accreted during outbursts, when the emission spectrum is soft, and only a small fraction in quiescent periods, characterized by rather hard spectra.
publisher: ZDV Universität Tübingen
contributor: ZDV Universität Tübingen (producer)
creation date: 2010-08-18
dc type: image
localtype: video
identifier: UT_20100818_006_eurowd_0001
language: eng
rights: Url: https://timmsstatic.uni-tuebingen.de/jtimms/TimmsDisclaimer.html?638679526812404635