Geier, S., Marsh, T. R., Dunlap, B. H., Barlow, B. N., Schaffenroth, V.., Ziegerer, E., Heber, U., Kupfer, T., Maxted, P. F. L., Miszalski, B., Shporer, A., Telting, J. H., Ostensen, R. H., O'Toole, S. J. , Gänsicke, B. T. (Boris T.) and Napiwotzki, R. (2013) Discovery of the closest hot subdwarf binary with White Dwarf companion. In: 18th European White Dwarf Workshop, EUROWD12, Kracow, Poland, 13–17 Aug 2012. Published in: 18th European White Dwarf Workshop, Volume 469 pp. 373-378. ISBN 9781583818206.

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Abstract

We report the discovery of an extremely close, eclipsing binary system. A white dwarf is orbited by a core He-burning compact hot subdwarf star with a period as short as similar or equal to 0.04987 d making this system the most compact hot subdwarf binary discovered so far. The subdwarf will start to transfer helium-rich material on short timescales of less than 50 Myr. The ignition of He-burning at the surface may trigger carbon-burning in the core although the WD is less massive than the Chandrasekhar limit (> 0.74 M-circle dot) making this binary a possible progenitor candidate for a supernova type Ia event.

Item Type:	Conference Item (Paper)
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	18th European White Dwarf Workshop
Publisher:	Astronomical Society of the Pacific Conference Proceedings
ISBN:	9781583818206
Official Date:	2013
Dates:	Date Event 2013 Published
Volume:	Volume 469
Page Range:	pp. 373-378
Status:	Peer Reviewed
Publication Status:	Published
Conference Paper Type:	Paper
Title of Event:	18th European White Dwarf Workshop, EUROWD12
Type of Event:	Conference
Location of Event:	Kracow, Poland
Date(s) of Event:	13–17 Aug 2012

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