Science with the TianQin Observatory: Preliminary results on stochastic gravitational-wave background

Liang, Zheng-Cheng; Hu, Y. M.; Jiang, Yun; Cheng, Jun; Zhang, Jian-dong; Mei, Jianwei

doi:10.1103/physrevd.105.022001

Cited by 67 publications

(25 citation statements)

References 225 publications

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“…• TianQin I+II : a twin constellations of satellites with perpendicular orbital planes, operate in a relay mode and can avoid the 3 months gap in data [76,81,164];…”

Section: B Detections With Gw Detectorsmentioning

confidence: 99%

Constraining the Hubble constant to a precision of about 1% using multi-band dark standard siren detections

Zhu,

Xie,

et al. 2021

Preprint

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“…• TianQin I+II : a twin constellations of satellites with perpendicular orbital planes, operate in a relay mode and can avoid the 3 months gap in data [76,81,164];…”

Section: B Detections With Gw Detectorsmentioning

confidence: 99%

Constraining the Hubble constant to a precision of about 1% using multi-band dark standard siren detections

Zhu,

Xie,

et al. 2021

Preprint

Self Cite

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“…At the low-frequency end of the TianQin observation range, there exist numerous compact binaries in the Galaxy, whose GW signals overlap to give rise to a stochastic unresolved signal, sometimes referred to as the foreground. Preliminary analyses suggest that such a foreground will be consistently below the sensitivity curve for resolved sources, given that the operation time of TianQin is limited to five years [12]. We therefore do not consider the effect of Galactic compact binaries throughout this work.…”

Section: Detector Noisementioning

confidence: 99%

“…In the last few years, a systematic effort has been undertaken to study the science prospects of Tian-Qin [7]. On the astrophysics side, this included the study of the detection prospects for Galactic ultra-compact binaries [8], coalescing MBHs [9,10], the low-frequency inspiral of stellar-mass black holes [11], and stochastic GW backgrounds [12]. On the fundamental physics side, TianQin's ability to test the black hole no-hair theorem with the ringdown of MBHs resulting from a merger has been analyzed, both in a theory-agnostic framework [13] and within specific gravitational theories extending general relativity [14], and more work is in preparation in this direction.…”

Section: Introductionmentioning

confidence: 99%

Science with the TianQin observatory: Preliminary result on extreme-mass-ratio inspirals

Fan,

Hu,

Barausse

et al. 2020

Preprint

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Systems consisting of a massive black hole (MBH) and a stellar-origin compact object (CO), known as extreme mass-ratio inspirals (EMRIs), are of great significance for space-based gravitational-wave detectors, as they will allow for testing gravitational theories in the strong field regime, and for checking the validity of the black hole no-hair theorem. In this work, we present a calculation of the EMRI rate and parameter estimation capabilities of the TianQin observatory, for various astrophysical models for these sources. We find that TianQin can observe EMRIs involving COs with mass of 10M up to redshift ∼ 2. We also find that detections could reach tens or hundreds per year in the most optimistic astrophysical scenarios. Intrinsic parameters are expected to be recovered to within fractional errors of ∼ 10 −6 , while typical errors on the luminosity distance and sky localization are 10% and 10 deg 2 , respectively. TianQin observation of EMRIs can also constrain possible deviations from the Kerr quadrupole moment to within fractional errors 10 −4 . We also find that a network of multiple detectors would allow for improvements in both detection rates (by a factor ∼ 1.5-3) and in parameter estimation precision (20-fold improvement for the sky localization and 5-fold improvement for the other parameters.)

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“…Besides individually resolved binaries, stochastic backgrounds of astrophysical and cosmological origin can be detected at mHz frequencies [e.g. 24,25]. Therefore, this band is expected to provide rich and diverse science ranging from Galactic astronomy to high-redshift cosmology and to fundamental physics [26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, a significant effort has been put into the study and consolidation of the science cases for TianQin [56]. On the astrophysics side, these efforts include studies on the detection prospect of massive black hole binaries [14,57], EMRIs [19], stellarmass black hole binaries [58] and stochastic backgrounds [25]; on the fundamental physics side, prospects for testing of the no-hair theorem with GWs from massive black hole binaries [28] and constraints on modified gravity theories [29] have been assessed for TianQin. In this paper we aim to forecast detection of Galactic DWDs with TianQin.…”

Section: Introductionmentioning

confidence: 99%

Science with the TianQin Observatory: Preliminary results on Galactic double white dwarf binaries

Huang,

Hu,

Korol

et al. 2020

Preprint

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We explore the prospects of detecting of Galactic double white dwarf (DWD) binaries with the space-based gravitational wave (GW) observatory TianQin. In this work we analyse both a sample of currently known and a realistic synthetic population of DWDs to assess the number of guaranteed detections and the full capacity of the mission. We find that TianQin can detect 12 out of ∼ 100 known DWDs; GW signals of these binaries can be modelled in detail ahead of the mission launch, and therefore they can be used as verification sources. Besides we estimate that TianQin has potential to detect as many as 10 4 DWDs in the Milky Way. TianQin is expected to measure their orbital periods and amplitudes with accuracy of ∼ 10 −7 and ∼ 0.2 respectively, and to localize on the sky a large fraction (39%) of the detected population to better than 1 deg 2 . We conclude that TianQin has the potential to significantly advance our knowledge on Galactic DWDs by increasing the sample up to 2 orders of magnitude, and will allow their multi-messenger studies in combination with electromagnetic telescopes. We also test the possibilities of different configuration of TianQin: 1) the same mission with a different orientation, 2) two perpendicular constellations combined into a network, and 3) the combination of the network with the ESA-lead Laser Interferometer Space Antenna. We find that the network of detectors boosts the accuracy on the measurement of source parameters by 1 − 2 orders of magnitude, with the improvement on sky localization being the most significant.

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Science with the TianQin Observatory: Preliminary results on stochastic gravitational-wave background

Cited by 67 publications

References 225 publications

Constraining the Hubble constant to a precision of about 1% using multi-band dark standard siren detections

Constraining the Hubble constant to a precision of about 1% using multi-band dark standard siren detections

Science with the TianQin observatory: Preliminary result on extreme-mass-ratio inspirals

Science with the TianQin Observatory: Preliminary results on Galactic double white dwarf binaries

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