Precision cosmology from future lensed gravitational wave and electromagnetic signals

Liao, Kai; Fan, X.; Ding, Xuheng; Biesiada, Marek; Zhu, Zong-Hong

doi:10.1038/s41467-017-01152-9

Cited by 165 publications

(139 citation statements)

References 46 publications

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“…We note that weak gravitational lensing is also expected to affect gravitationalwave standard sirens, e.g. Shang & Haiman (2011) , Liao et al (2017).…”

Section: Introductionmentioning

confidence: 85%

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

Macaulay¹,

Bacon²,

Nichol³

et al. 2020

Monthly Notices of the Royal Astronomical Society

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ABSTRACT We consider the effects of weak gravitational lensing on observations of 196 spectroscopically confirmed Type Ia Supernovae (SNe Ia) from years 1 to 3 of the Dark Energy Survey (DES). We simultaneously measure both the angular correlation function and the non-Gaussian skewness caused by weak lensing. This approach has the advantage of being insensitive to the intrinsic dispersion of SNe Ia magnitudes. We model the amplitude of both effects as a function of σ8, and find σ8 =1.2$^{+0.9}_{-0.8}$. We also apply our method to a subsample of 488 SNe from the Joint Light-curve Analysis (JLA; chosen to match the redshift range we use for this work), and find σ8 =0.8$^{+1.1}_{-0.7}$. The comparable uncertainty in σ8 between DES–SN and the larger number of SNe from JLA highlights the benefits of homogeneity of the DES–SN sample, and improvements in the calibration and data analysis.

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“…We note that weak gravitational lensing is also expected to affect gravitationalwave standard sirens, e.g. Shang & Haiman (2011) , Liao et al (2017).…”

Section: Introductionmentioning

confidence: 85%

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

Macaulay¹,

Bacon²,

Nichol³

et al. 2020

Monthly Notices of the Royal Astronomical Society

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show abstract

“…One the other hand, the best uncertainty of the reconstructed Fermat potential of the lens galaxy at present is about 3% for lensed quasar systems based on the current lensing project H0LiCOW (Suyu et al 2017). And Liao et al (2017) claimed that the lens model of GW and host galaxy system would be more precise and accurate. However, this precise and accurate lens model heavily relies on the high resolution imaging of the host galaxy and spectroscopic observations of stellar kinematics of the lens galaxy which we don't expect for every strong lensing system.…”

Section: Resultsmentioning

confidence: 99%

Strong lensing as a giant telescope to localize the host galaxy of gravitational wave event

Zhang

Wang

2020

Monthly Notices of the Royal Astronomical Society

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Abstract Standard siren cosmology of gravitational wave (GW) merger events relies on the identification of host galaxies and their redshifts. But this can be highly challenging due to numerous candidates of galaxies in the GW localization area. We point out that the number of candidates can be reduced by orders of magnitude for strongly lensed GW events, due to extra observational constraints. For the next-generation GW detectors like Einstein Telescope (ET), we estimate that this number is usually significantly less than one, as long as the GW localization uncertainty is better than $\sim 10\, \rm deg^2$. This implies that the unique identification of the host galaxy of lensed GW event detected by ET and Cosmic Explorer (CE) is possible. This provides us a promising opportunity to measure the redshift of the GW event and facilitate the standard siren cosmology. We also discuss its potential applications in understanding the evolution process and environment of the GW event.

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“…Even though it was shown in [20] that with about 10 lensed GW and EM signals (realistic number for the ET) one would achieve a sub-percent accuracy of the H 0 measurement, yet it would not be fast and easy to gather such a sample. In particular, the pipelines to identify lensed GW events are still under development.…”

Section: Discussionmentioning

confidence: 99%

Cosmological inference from standard sirens without redshift measurements

Ding

Biesiada

Zheng

et al. 2019

J. Cosmol. Astropart. Phys.

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The purpose of this work is to investigate the prospects of using the future standard siren data without redshift measurements to constrain cosmological parameters. With successful detections of gravitational wave (GW) signals an era of GW astronomy has begun. Unlike the electromagnetic domain, GW signals allow direct measurements of luminosity distances to the sources, while their redshifts remain to be measured by identifying electromagnetic counterparts. This leads to significant technical problems for almost all possible BH-BH systems. It is the major obstacle to cosmological applications of GW standard sirens. In this paper, we introduce the general framework of using luminosity distances alone for cosmological inference. The idea is to use the prior knowledge of the redshift probability distribution for coalescing sources from the intrinsic merger rates assessed with population synthesis codes. Then the posterior probability distributions for cosmological parameters can be calculated. We demonstrate the performance of our method on the simulated mock data and show that the luminosity distance measurement would enable an accurate determination of cosmological parameters up to 20% uncertainty level. We also find that in order to infer H 0 to 1% level with flat ΛCDM model, we need about 10 5 events.

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Precision cosmology from future lensed gravitational wave and electromagnetic signals

Cited by 165 publications

References 46 publications

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

Weak lensing of Type Ia Supernovae from the Dark Energy Survey

Strong lensing as a giant telescope to localize the host galaxy of gravitational wave event

Cosmological inference from standard sirens without redshift measurements

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