On Using Inspiraling Supermassive Binary Black Holes in the PTA Frequency Band as Standard Sirens to Constrain Dark Energy
文献类型：期刊论文
| 作者 | Yan,Changshuo3,4 ; Zhao,Wen1,2; Lu,Youjun3,4
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| 刊名 | The Astrophysical Journal
 |
| 出版日期 | 2020-01-28 |
| 卷号 | 889期号:2 |
| 关键词 | Supermassive black holes Gravitational waves Gravitational wave astronomy Dark energy Cosmological parameters Active galactic nuclei Fisher's Information Black hole physics Pulsar timing method |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/ab60a6 |
| 英文摘要 | Abstract Supermassive binary black holes (SMBBHs) in galactic centers may radiate gravitational waves (GW) in the nano-Hertz frequency band, which are expected to be detected by pulsar timing arrays (PTAs) in the near future. GW signals from individual SMBBHs at cosmic distances, if detected by PTAs, are potentially powerful standard sirens that can be used to independently measure distances and thus put constraints on cosmological parameters. In this paper, we investigate the constraint that may be obtained on the equation of state (w) of dark energy by using those SMBBHs, expected to be detected by the PTAs in the Square Kilometre Array (SKA) era. By considering both the currently available SMBBH candidates and mock SMBBHs in the universe resulting from a simple galaxy major merger model, we find that ～200–3000 SMBBHs with chirp mass >109 M⊙ are expected to be detected with a signal-to-noise ratio >10 by SKA–PTA with conservative and optimistic settings and they can be used to put a constraint on w to an uncertainty of Δw?～?0.02–0.1. If further information on the mass and mass ratio of those SMBBHs can be provided by electromagnetic observations (e.g., chirp mass uncertainty ?50%), the constraint may be further improved to a ?0.01 level, as many more SMBBHs will be detected by SKA–PTA with relatively better distance measurements and can be used as the standard sirens. |
| 语种 | 英语 |
| WOS记录号 | IOP:0004-637X-889-2-AB60A6 |
| 出版者 | The American Astronomical Society |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/28745]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.School of Astronomy and Space Science, University of Science and Technology of China, Hefei, 230026, People's Republic of China 2.CAS Key Laboratory for Researches in Galaxies and Cosmology, Department of Astronomy, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, Anhui 230026, People's Republic of China; wzhao7@ustc.edu.cn 3.School of Astronomy and Space Science University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China 4.CAS Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China; yancs@nao.cas.cn, luyj@nao.cas.cn |
| 推荐引用方式 GB/T 7714 | Yan,Changshuo,Zhao,Wen,Lu,Youjun. On Using Inspiraling Supermassive Binary Black Holes in the PTA Frequency Band as Standard Sirens to Constrain Dark Energy[J]. The Astrophysical Journal,2020,889(2). |
| APA | Yan,Changshuo,Zhao,Wen,&Lu,Youjun.(2020).On Using Inspiraling Supermassive Binary Black Holes in the PTA Frequency Band as Standard Sirens to Constrain Dark Energy.The Astrophysical Journal,889(2). |
| MLA | Yan,Changshuo,et al."On Using Inspiraling Supermassive Binary Black Holes in the PTA Frequency Band as Standard Sirens to Constrain Dark Energy".The Astrophysical Journal 889.2(2020). |
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来源：国家天文台
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