Original title: The peculiar outburst activity of the symbiotic binary AG Draconis
Authors: Gális, R. ; Merc, J. ; Leedjärv, L. ; Vrašťák, M. ; Karpov, Sergey
Document type: Papers
Conference/Event: Conference on Variable Stars Research /50./, Brno (CZ), 20181130
Year: 2019
Language: eng
Abstract: AG Draconis is a strongly interacting binary system which manifests characteristic symbiotic activity of alternating quiescent and active stages. The latter ones consist of the series of individual outbursts repeating at about a one-year interval. After seven years of flat quiescence following the 2006–2008 major outbursts, in the late spring of 2015, the symbiotic system AG Dra started to become brighter again toward what appeared to be a new minor outburst. The current outburst activity of AG Dra was confirmed by the following three outbursts in April 2016, May 2017 and April 2018. The photometric and spectroscopic observations suggest that all these outbursts are of the hot type. Such behaviour is considerably peculiar in almost 130-year history of observing of this object, because the major outbursts at the beginning of active stages are typically cool ones. In the present work, the current peculiar activity of the symbiotic binary AG Dra is described in detail.\n
Keywords: AG Draconis; LC; outburst
Project no.: CZ.02.1.01/0.0/0.0/15_003/0000437, EF15_003/0000437
Funding provider: OP VVV - CoGraDS, GA MŠk
Host item entry: Proceedings of the Conference on Variable Stars Research /50./, ISSN 1801-5964

Institution: Institute of Physics AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: http://astro.sci.muni.cz/variables/oejv/issues/oejv0197.pdf
Original record: http://hdl.handle.net/11104/0306636

Permalink: http://www.nusl.cz/ntk/nusl-410296


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