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Science with the TianQin observatory: Preliminary results on massive black hole binaries

Hai-Tian WangTianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Sun Yat-sen University, 2 Daxue Rd., Zhuhai 519082, ChinaZhen JiangKey Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, 100012, ChinaAlberto SesanaSchool of Physics and Astronomy and Institute of Gravitational Wave Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, United KingdomEnrico BarausseIFPU—Institute for Fundamental Physics of the Universe, Via Beirut 2, 34014 Trieste, ItalyS. HuangTianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Sun Yat-sen University, 2 Daxue Rd., Zhuhai 519082, ChinaYifan WangDepartment of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong KongWen-Fan FengMOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaYan WangDepartment of Physics, The Chinese University of Hong Kong, Shatin, N.T., Hong KongYi-Ming HuTianQin Research Center for Gravitational Physics & School of Physics and Astronomy, Sun Yat-sen University, 2 Daxue Rd., Zhuhai 519082, ChinaJianwei MeiMOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, ChinaJun LuoMOE Key Laboratory of Fundamental Physical Quantities Measurements, Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China

2019en

ABI

Annotatsiya

We investigate the prospects of detecting gravitational waves from coalescing massive black hole binaries in the Universe with the TianQin observatory, a space-based gravitational wave interferometer proposed to be launched in the 2030s. To frame the scientific scope of the mission, in this paper, we carry out a preliminary estimation of the signal-to-noise ratio, detection rate, and parameter estimation precision of massive black hole binaries detectable by TianQin. In order to make our results as robust as possible, we consider several models of the growth history of massive black holes, exploring the effect of some key astrophysical prescriptions as well as the impact of the employed computational methods. In the most optimistic model, TianQin can detect as many as approximately 60 mergers per year. If TianQin detects a merger at redshift of 15, it will be capable of estimating its luminosity distance to within an accuracy of 10%; for a nearby event at redshift approximately 2, TianQin can issue early warnings 24 hours before coalescence, with a timing accuracy of around three hours and a sky localization ability of approximately $80\text{ }\text{ }{\mathrm{deg}}^{2}$, thus enabling multimessenger observations.

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Identifikatorlar

DOI: 10.1103/physrevd.100.043003

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