Forecast for cosmological parameter estimation with gravitational-wave standard sirens from the LISA-Taiji network

Wang, Ling‐Feng; Jin, Shang-Jie; Zhang, Jingfei; Zhang, Xin

doi:10.1007/s11433-021-1736-6

Cited by 49 publications

(27 citation statements)

References 149 publications

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“…The detections of SMBHBs with masses of ∼ 10 8 − 10 10 M require some natural galactic-scale detector comprised of an array of millisecond pulsars (MSPs), usually referred to as "Pulsar Timing Array" (PTA). There have been a series of works discussing the SMBHB bright sirens based on space-borne observatories [50][51][52][53][54][55][56][57][58], but using PTAs to observe SMBHB bright sirens still deserves further investigation.…”

Section: Introductionmentioning

confidence: 99%

“…Obviously, such a treatment cannot reveal how well the PTA nanohertz GW observations could constrain cosmological parameters. Actually, the most prominent advantage of GW bright sirens in cosmological parameter estimations is that they can break the degeneracies between cosmological parameters [24,56,58,[91][92][93][94][95][96]. The capabilities of the bright sirens from ground-based detectors and spaceborne observatories to break the parameter degeneracies have been widely discussed (see Ref.…”

Section: Introductionmentioning

confidence: 99%

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Achieving precision cosmology with gravitational-wave bright sirens from SKA-era pulsar timing arrays

Wang¹,

Shao²,

Zhang³

et al. 2022

Preprint

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Nanohertz gravitational waves (GWs) generated by the individual inspiraling supermassive black hole binaries (SMBHBs) in the centers of galaxies may be detected by pulsar timing arrays (PTAs) in the future. The GW signals from individual SMBHBs can be employed as standard sirens to measure absolute cosmic distances, and further provide constraints on cosmological parameters via the distance-redshift relation. Namely, these SMBHBs with known redshifts can serve as bright sirens. In this paper, we analyze the ability of SKA-era PTAs to detect existing SMBHB candidates by means of simulating the timing residuals of pulsar signals, and use the mock data of SMBHB bright sirens to perform cosmological parameter estimations. We find that once the root mean square of timing residuals (σt) could be reduced to 20 ns, about only 100 millisecond pulsars are needed to provide a tight constraint on the Hubble constant (H0) with the precision close to 1%, which meets the criterion of precision cosmology. We further show that the SMBHB bright sirens can effectively break the cosmological parameter degeneracies inherent in the CMB data, and thus improve the constraint precision of the equation of state of dark energy (w) to 3.5%, which is comparable with the result of Planck 2018 TT,TE,EE+lowE+lensing+SNe+BAO. We conclude that the bright sirens from SKA-era PTAs will play an important role in breaking the cosmological parameter degeneracies and exploring the nature of dark energy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Achieving precision cosmology with gravitational-wave bright sirens from SKA-era pulsar timing arrays

Wang¹,

Shao²,

Zhang³

et al. 2022

Preprint

Self Cite

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“…For a comparison, for SN Ia, only relative distances can be obtained. If the redshift of GW event is obtained through the electromagnetic counterpart or its host galaxy, the distanceredshift relation can be established, which is of importance for cosmological studies (Qi et al 2019b,a;Zhao et al 2011;Wang et al 2018;Zhang 2019;Wang et al 2020a;Zhang et al 2019aZhang et al , 2020Zhao et al 2020;Jin et al 2020;Wang et al 2022;Jin et al 2021;Bian et al 2021). According to the conservative estimates, the third-generation ground-based GW observatory, such as the Einstein Telescope (ET) with one order of magnitude more sensitive than the current GW detectors, can detect 1000 GW events with the redshift information from the binary neutron star (BNS) mergers in a tenyear observation (Nissanke et al 2010;Zhao et al 2011;Cai & Yang 2017;Zhao & Wen 2018;Chen et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Cosmological model-independent measurement of cosmic curvature using distance sum rule with the help of gravitational waves

Wang¹,

Qi²,

Wang³

et al. 2022

Preprint

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Although the cosmic spatial curvature has been precisely constrained in the standard cosmological model using the observations of cosmic microwave background anisotropies, it is still of great importance to independently measure this key parameter using only the late-universe observations in a cosmological model-independent way. The distance sum rule in strong gravitational lensing (SGL) provides such a way, provided that the three distances in the sum rule can be calibrated by other observations. Usually, such a calibration can be performed by using the type Ia supernovae (SN Ia), which, however, has some drawbacks, e.g., dependence on distance ladder, narrow redshift range, etc. In this paper, we propose that gravitational waves (GWs) can be used to provide the distance calibration in the SGL method, which can avoid the dependence on distance ladder and cover a wider redshift range. Using the simulated GW standard siren observation by the Einstein Telescope as an example, we show that this scheme is feasible and advantageous. We find that ∆Ω k 0.17 with the current SGL data, which is slightly more precise than the case of using SN Ia to calibrate. Furthermore, we consider the forthcoming LSST survey that is expected to observe many SGL systems. We simulate a realistic population of SGL systems that will be observed in the near future, and we find that about 10 4 SGL data could provide the precise measurement of ∆Ω k 10 −2 with the help of GWs. Our work indicates that the observations of SGL and GWs by the next-generation facilities would improve the late-universe measurement of cosmic curvature by one order of magnitude.

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“…Recently, with the successful detections of gravitational waves (GWs) by LIGO and VIRGO detectors (Abbott et al 2016a(Abbott et al ,b, 2017a, the era of GW astronomy and multi-message astronomy is coming. Compared to traditional cosmological probes, a great advantage of GW is that the standard siren could provide the absolute luminosity distance (Schutz 1986;Abbott et al 2017b) without any calibration, which can play an extremely important role in cosmological studies (Zhao et al 2011;Wang et al 2018;Zhang 2019;Wang et al 2020;Zhang et al 2019;Zhao et al 2020;Jin et al 2020;Wang et al 2022;Jin et al 2021). Up to now, the available standard siren data are too few to make a significant con-tribution to cosmology.…”

Section: Introductionmentioning

confidence: 99%

A new way to explore cosmological tensions using gravitational waves and strong gravitational lensing

Cao,

Zheng,

et al. 2021

Preprint

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In recent years, a crisis in the standard cosmology has been caused by inconsistencies in the measurements of some key cosmological parameters, Hubble constant H 0 and cosmic curvature parameter Ω K for example. It is necessary to remeasure them with the cosmological model-independent methods. In this paper, based on the distance sum rule, we present such a way to constrain H 0 and Ω K simultaneously in the late universe from strong gravitational lensing time delay (SGLTD) data and gravitational wave (GW) standard siren data simulated from the future observation of the Einstein Telescope (ET). Based on the currently 6 observed SGLTD data, we find that the constraint precision of H 0 from the combined 100 GW events can be comparable with the measurement from SH0ES collaboration. As the number of GW events increases to 700, the constraint precision of H 0 will exceed that of the Planck 2018 results. Considering 1000 GW events as the conservative estimation of ET in ten-year observation, we obtain H 0 = 73.69 ± 0.36 km s −1 Mpc −1 with a 0.5% uncertainty and Ω K = 0.076 +0.068 −0.087 . In addition, we simulate 55 SGL systems with 5% uncertainty for the measurement of time-delay distance. By combining with 1000 GWs, we infer that H 0 = 73.63 ± 0.33 km s −1 Mpc −1 and Ω K = 0.008±0.038. Our results suggest that this approach can play an important role in exploring cosmological tensions.

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Forecast for cosmological parameter estimation with gravitational-wave standard sirens from the LISA-Taiji network

Cited by 49 publications

References 149 publications

Achieving precision cosmology with gravitational-wave bright sirens from SKA-era pulsar timing arrays

Achieving precision cosmology with gravitational-wave bright sirens from SKA-era pulsar timing arrays

Cosmological model-independent measurement of cosmic curvature using distance sum rule with the help of gravitational waves

A new way to explore cosmological tensions using gravitational waves and strong gravitational lensing

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