A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae

	A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae
	Geier, S 1,2; Marsh, TR 3; Wang B(王博)4 ; Dunlap, B 5; Barlow, BN 6; Schaffenroth, V 2,7; Chen XF(陈雪飞)4 ; Irrgang, A 2; Maxted, PFL 8; Ziegerer, E 2
刊名	ASTRONOMY & ASTROPHYSICS
	2013-06
卷号	554
关键词	binaries: spectroscopic subdwarfs supernovae: general
ISSN号	0004-6361
通讯作者	Geier, S (reprint author), European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
产权排序	第四完成单位
英文摘要	Type Ia supernovae (SN Ia) are the most important standard candles for measuring the expansion history of the universe. The thermonuclear explosion of a white dwarf can explain their observed properties, but neither the progenitor systems nor any stellar remnants have been conclusively identified. Underluminous SN Ia have been proposed to originate from a so-called double-detonation of a white dwarf. After a critical amount of helium is deposited on the surface through accretion from a close companion, the helium is ignited causing a detonation wave that triggers the explosion of the white dwarf itself. We have discovered both shallow transits and eclipses in the tight binary system CD-30 degrees 11223 composed of a carbon/oxygen white dwarf and a hot helium star, allowing us to determine its component masses and fundamental parameters. In the future the system will transfer mass from the helium star to the white dwarf. Modelling this process we find that the detonation in the accreted helium layer is sufficiently strong to trigger the explosion of the core. The helium star will then be ejected at such high velocity that it will escape the Galaxy. The predicted properties of this remnant are an excellent match to the so-called hypervelocity star US 708, a hot, helium-rich star moving at more than 750 km s(-1), sufficient for it to leave the Galaxy. The identification of both progenitor and remnant provides a consistent picture of the formation and evolution of underluminous SNIa.
学科主题	Astronomy & Astrophysics
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Astronomy & Astrophysics
研究领域[WOS]	Astronomy & Astrophysics
关键词[WOS]	SUBDWARF-B-STARS ; SUB-CHANDRASEKHAR SUPERNOVAE ; HOT SUBLUMINOUS STARS ; WHITE-DWARF ; STELLAR EVOLUTION ; UNSEEN COMPANIONS ; DELAY TIMES ; KPD 1930+2752 ; BRANCH STARS ; GALEX SURVEY
收录类别	SCI ; EI
原文出处	http://www.aanda.org/articles/aa/abs/2013/06/aa21395-13/aa21395-13.html
语种	英语
WOS记录号	WOS:000320444200053
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4553]
专题	云南天文台_大样本恒星演化研究组云南天文台_中国科学院天体结构与演化重点实验室
作者单位	1.European Southern Observatory, Karl-Schwarzschild-Str. 2, 85748 Garching, Germany 2.Dr. Karl Remeis-Observatory & ECAP, Astronomical Institute, Friedrich-Alexander University Erlangen-Nürnberg, Sternwartstr. 7, 96049 Bamberg, Germany 3.Department of Physics, University of Warwick, Conventry CV4 7AL, UK 4.Key Laboratory of the Structure and Evolution of Celestial Objects, Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, PR China 5.Department of Physics and Astronomy, University of North Carolina, Chapel Hill, NC 27599-3255, USA 6.The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802, USA 7.Institute for Astro- and Particle Physics, University of Innsbruck, Technikerstr. 25/8, 6020 Innsbruck, Austria 8.Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK 9.Department of Astrophysics/IMAPP, Radboud University Nijmegen, PO Box 9010, 6500 GL Nijmegen, The Netherlands 10.South African Astronomical Observatory, PO Box 9, Observatory, 7935 Cape Town, South Africa
推荐引用方式 GB/T 7714	Geier, S,Marsh, TR,Wang B,et al. A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae[J]. ASTRONOMY & ASTROPHYSICS,2013,554.
APA	Geier, S.,Marsh, TR.,Wang B.,Dunlap, B.,Barlow, BN.,...&Napiwotzki, R.(2013).A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae.ASTRONOMY & ASTROPHYSICS,554.
MLA	Geier, S,et al."A progenitor binary and an ejected mass donor remnant of faint type Ia supernovae".ASTRONOMY & ASTROPHYSICS 554(2013).