气候变化领域集成服务门户(CCPortal): The real-time stellar evolution of Sakurai's object

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DOI	10.1126/science.1108953
	The real-time stellar evolution of Sakurai's object
	Hajduk M.; Zijlstra A.A.; Herwig F.; Van Hoof P.A.M.; Kerber F.; Kimeswenger S.; Pollacco D.L.; Evans A.; Lopéz J.A.; Bryce M.; Eyres S.P.S.; Matsuura M.
发表日期	2005
ISSN	0036-8075
起始页码	231
结束页码	233
卷号	308 期号:5719
英文摘要	After a hot white dwarf ceases its nuclear burning, its helium may briefly and explosively reignite. This causes the star to evolve back into a cool giant, whereupon it experiences renewed mass ejection before reheating. A reignition event of this kind was observed in 1996 in V4334 Sgr (Sakurai's object). Its temperature decrease was 100 times the predicted rate. To understand its unexpectedly fast evolution, we have developed a model in which convective mixing is strongly suppressed under the influence of flash burning. The model predicts equally rapid reheating of the star. Radio emission from freshly ionized matter now shows that this reheating has begun. Such events may be an important source of carbon and carbonaceous dust in the Galaxy.
英文关键词	Carbon; Combustion; Dust; Heat convection; Heating; Ionization; Mixing; Thermal effects; Carbonaceous dust; Dwarf; Radio emission; Sakurai'so bject; Galaxies; carbon; helium; hydrogen; nitrogen; oxygen; astronomy; article; astronomy; computer simulation; cosmological phenomena; electron; heating; ionization; luminance; mass; priority journal; star; temperature
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243916
作者单位	School of Physics and Astronomy, University of Manchester, Post Office Box 88, Manchester M60 1QD, United Kingdom; Centrum Astronomii UMK, ul. Gagarina 11, PL-87-100 Torun, Poland; Theoretical Astrophysics Group T-6, Los Alamos National Laboratory, MS B227, Los Alamos, NM 87545, United States; APS Division, Department of Physics and Astronomy, Queen's University Belfast, Belfast BT7 1NN, United Kingdom; Royal Observatory of Belgium, Ringlaan 3, Brussels, Belgium; Space Telescope Europ. Coord. Facil., European Southern Observatory (ESO), Karl-Schwarzschild-Strasse 2, 85748 Garching, Germany; Institut für Astrophysik, Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria; Department of Physics, School of Chemistry and Physics, Keele University, Staffordshire STS SBG, United Kingdom; Institute de Astronomía, Univ. Nacional Autonome de Mexico, Apdo. Postal 877, 22800 Ensenada, BC, Mexico; Jodrell Bank Observatory, School of Physics and Astronomy, University of Manchester, Macclesfield, Cheshire SK1...
推荐引用方式 GB/T 7714	Hajduk M.,Zijlstra A.A.,Herwig F.,et al. The real-time stellar evolution of Sakurai's object[J],2005,308(5719).
APA	Hajduk M..,Zijlstra A.A..,Herwig F..,Van Hoof P.A.M..,Kerber F..,...&Matsuura M..(2005).The real-time stellar evolution of Sakurai's object.Science,308(5719).
MLA	Hajduk M.,et al."The real-time stellar evolution of Sakurai's object".Science 308.5719(2005).