Gravitational wave radiation from close double white dwarfs in the Galaxy

	Gravitational wave radiation from close double white dwarfs in the Galaxy
	Liu JZ(刘进忠)1,2
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2009-12-21
卷号	400 期号:4 页码:1850-1858
关键词	gravitational waves binaries: close galaxy: stellar content
ISSN号	0035-8711
通讯作者	Liu, JZ (reprint author), Chinese Acad Sci, Natl Astron Observ, Yunnan Observ, Kunming 650011, Peoples R China.
产权排序	第一完成单位
英文摘要	Close double white dwarfs (CDWDs) are believed to dominate the Galactic gravitational wave (GW) foreground radiation in the frequency range 10(-4) to 0.1 Hz, which will be detected by the Laser Interferometer Space Antenna (LISA). In this frequency range, the foreground radiation is predicted to be larger than both instrumental noise and the GW radiation from other sources, such as extragalactic low-mass X-ray binaries. We study the production of CDWDs using a binary population synthesis approach, and calculate their contribution to the Galactic GW foreground radiation. From a sample of 10(7) binaries, we select CDWD systems that would radiate at frequencies between 10(-8) and 10(-2) Hz. We calculate the evolutionary processes of the selected objects and conclude that the CDWD systems radiating at lower frequencies than 10(-3) Hz are LISA foreground sources, while those radiating at higher frequencies are possibly resolved sources. The CDWD systems which make up the LISA GW foreground are produced through three evolutionary channels: stable Roche lobe overflow (RLOF) plus common envelope (CE); CE plus CE; and exposed core plus CE, as proposed by Han (1998). We find that the resolved CDWDs are produced by the CE plus CE channel. We analyse the proportion of the resolved CDWDs that are compositionally double helium, or carbon-oxygen plus helium WD binary systems.
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]	BINARY STELLAR EVOLUTION ; MASS-RATIO DISTRIBUTION ; COMMON-ENVELOPE PHASE ; BLACK-HOLE BINARIES ; INITIAL MASS ; SPECTROSCOPIC BINARIES ; DOUBLE DEGENERATE ; COMPACT OBJECTS ; POINT MASSES ; STARS
收录类别	SCI
原文出处	http://mnras.oxfordjournals.org/content/400/4/1850
语种	英语
WOS记录号	WOS:000272532100018
内容类型	期刊论文
源URL	[http://ir.ynao.ac.cn/handle/114a53/4463]
专题	云南天文台_大样本恒星演化研究组
作者单位	1.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, Kunming 650011, P.R. China 2.Graduate University of Chinese Academy of Sciences, Beijing 100039, P.R. China
推荐引用方式 GB/T 7714	Liu JZ. Gravitational wave radiation from close double white dwarfs in the Galaxy[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2009,400(4):1850-1858.
APA	Liu JZ.(2009).Gravitational wave radiation from close double white dwarfs in the Galaxy.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,400(4),1850-1858.
MLA	Liu JZ."Gravitational wave radiation from close double white dwarfs in the Galaxy".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 400.4(2009):1850-1858.