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A COMPREHENSIVE STUDY OF CLOSE DOUBLE WHITE DWARFS AS GRAVITATIONAL WAVE SOURCES: EVOLUTIONARY CHANNELS, BIRTH RATES, AND PHYSICAL PROPERTIES
Liu JZ(刘进忠)1,2,3; Han ZW(韩占文)1,3; Zhang FH(张奉辉)1,3; Zhang Y(张余)1,2,3; Liu, JZ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
发表期刊ASTROPHYSICAL JOURNAL
2010-08-20
卷号719期号:2页码:1546-1552
DOI10.1088/0004-637X/719/2/1546
产权排序第1完成单位
收录类别SCI
关键词Binaries: Close Galaxy: Stellar Content Gravitational Waves
摘要Close double white dwarfs (CDWDs) are believed to dominate the Galactic gravitational wave (GW) radiation in the frequency range 10(-4) to 0.1 Hz, which will be detected by the Laser Interferometer Space Antenna (LISA) detector. The aim of this detector is to detect GW radiation from astrophysical sources in the universe and to help improve our understanding of the origin of the sources and their physical properties (masses and orbital periods). In this paper, we study the probable candidate sources in the Galaxy for the LISA detector: CDWDs. We use the binary population synthesis approach of CDWDs together with the latest findings of the synthesis models from Han, who proposed three evolutionary channels: (1) stable Roche lobe overflow plus common envelope (RLOF+CE), (2) CE+CE, and (3) exposed core plus CE. As a result, we systematically investigate the detailed physical properties (the distributions of masses, orbital periods, and chirp masses) of the CDWD sources for the LISA detector, examine the importance of the three evolutionary channels for the formation of CDWDs, and carry out Monte Carlo simulations. Our results show that RLOF+CE and CE+CE are the main evolutionary scenarios leading to the formation of CDWDs. For the LISA detectable sources, we also explore and discuss the importance of these three evolutionary channels. Using the calculated birth rate, we compare our results to the LISA sensitivity curve and the foreground noise floor of CDWDs. We find that our estimate for the number of CDWD sources that can be detected by the LISA detector is greater than 10,000. We also find that the detectable CDWDs are produced via the CE+CE channel and we analyze the fraction of the detectable CDWDs that are double helium (He+He), or carbon-oxygen plus helium (CO+He) WD binary systems.
项目资助者Natural Science Foundation of China [10821061, 2007CB815406, 10773026] ; Chinese Academy of Sciences [KJCX2-YW-T24]
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-637X
URL查看原文
归档日期2010-08-04
WOS记录号WOS:000280658000041
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]PERIOD DOUBLE-DEGENERATE ; INTERFEROMETER-SPACE-ANTENNA ; STELLAR EVOLUTION ; SPY PROJECT ; PLANETARY-NEBULAE ; BINARY STARS ; MASS ; RADIATION ; SUPERNOVAE ; DISCOVERY
引用统计
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6164
专题太阳物理研究组
中国科学院天体结构与演化重点实验室
通讯作者Liu, JZ (reprint author), Chinese Acad Sci, Yunnan Observ, Natl Astron Observ, Kunming 650011, Peoples R China.
作者单位1.National Astronomical Observatories/Yunnan Observatory, The Chinese Academy of Sciences, Kunming 650011, China
2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China
3.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Beijing, China
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Liu JZ,Han ZW,Zhang FH,et al. A COMPREHENSIVE STUDY OF CLOSE DOUBLE WHITE DWARFS AS GRAVITATIONAL WAVE SOURCES: EVOLUTIONARY CHANNELS, BIRTH RATES, AND PHYSICAL PROPERTIES[J]. ASTROPHYSICAL JOURNAL,2010,719(2):1546-1552.
APA Liu JZ,Han ZW,Zhang FH,Zhang Y,&Liu, JZ .(2010).A COMPREHENSIVE STUDY OF CLOSE DOUBLE WHITE DWARFS AS GRAVITATIONAL WAVE SOURCES: EVOLUTIONARY CHANNELS, BIRTH RATES, AND PHYSICAL PROPERTIES.ASTROPHYSICAL JOURNAL,719(2),1546-1552.
MLA Liu JZ,et al."A COMPREHENSIVE STUDY OF CLOSE DOUBLE WHITE DWARFS AS GRAVITATIONAL WAVE SOURCES: EVOLUTIONARY CHANNELS, BIRTH RATES, AND PHYSICAL PROPERTIES".ASTROPHYSICAL JOURNAL 719.2(2010):1546-1552.
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