Cosmological forecasts with the clustering of weak lensing peaks

Abstract

Maximising the information that can be extracted from weak lensing measurements is a key goal for upcoming surveys such as LSST and Euclid. This is typically achieved through statistics that are complementary to the cosmic shear two-point correlation function, the most well established of which is the weak lensing peak abundance. In this work, we study the clustering of weak lensing peaks, and present parameter constraint forecasts for an LSST-like survey. We use the cosmoslics $w$CDM simulations to measure the peak two-point correlation function for a range of cosmological parameters, and use the simulation data to train a Gaussian process regression emulator which is applied to generate likelihood contours and provide parameter constraint forecasts from mock observations. We investigate the dependence of the peak two-point correlation function on the peak height, and find that the clustering of low amplitude peaks is complementary to that of high amplitude peaks. Consequently, their combination gives significantly tighter constraints than the clustering of high peaks alone. The peak two-point correlation function is significantly more sensitive to the cosmological parameters $h$ and $w_0$ than the peak abundance, and when the probes are combined, constraints on ${\Omega }_{\mathrm{m}}$, $S_8$, $h$ and $w_0$ improve by at least a factor of two, relative to the peak abundance alone. Finally, we compare the forecasts for weak lensing peaks and weak lensing voids, and show that the two are also complementary; both probes can offer better constraints on $S_8$ and $w_0$ than the shear correlation function by roughly a factor of two.

arXiv comment13 pages, 8 figures, comments welcome. arXiv admin note: text overlap with arXiv:2010.11954

References in corpus (44)

• emcee: The MCMC Hammer
• Weak Gravitational Lensing
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Tensions between the Early and the Late Universe
• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• Detection of weak gravitational lensing distortions of distant galaxies by cosmic dark matter at large scales
• Detection of Weak Gravitational Lensing by Large-scale Structure
• Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
• Cosmology with cosmic shear observations: a review
• Second Data Release of the Hyper Suprime-Cam Subaru Strategic Program
• Very weak lensing in the CFHTLS Wide: Cosmology from cosmic shear in the linear regime
• CFHTLenS: Combined probe cosmological model comparison using 2D weak gravitational lensing
• First cosmic shear results from the Canada-France-Hawaii Telescope Wide Synoptic Legacy Survey
• Analysis of two-point statistics of cosmic shear: I. Estimators and covariances
• Cosmology with the shear-peak statistics
• Cosmic Shear Analysis with CFHTLS Deep data
• Searching for massive clusters in weak lensing surveys
• Cosmology constraints from shear peak statistics in Dark Energy Survey Science Verification data
• KiDS-450: Cosmological Constraints from Weak Lensing Peak Statistics - II: Inference from Shear Peaks using N-body Simulations
• Statistics of Dark Matter Halos from Gravitational Lensing
• Cosmic Calibration: Constraints from the Matter Power Spectrum and the Cosmic Microwave Background
• Cosmological Information in Weak Lensing Peaks
• Detection of dark matter Skewness in the VIRMOS-DESCART survey: Implications for Ω_0
• Constraining $f(R)$ Gravity Theory Using Weak Lensing Peak Statistics from the Canada-France-Hawaii-Telescope Lensing Survey
• Cosmological Simulations for Combined-Probe Analyses: Covariance and Neighbour-Exclusion Bias
• Simulations of Weak Gravitational Lensing - II : Including Finite Support Effects in Cosmic Shear Covariance Matrices
• Constraining neutrino mass with tomographic weak lensing peak counts
• Cosmic Shear Covariance Matrix in $w$CDM: Cosmology Matters
• Impact of Baryonic Processes on Weak Lensing Cosmology: Power Spectrum, Non-Local Statistics, and Parameter Bias
• The cosmological information of shear peaks: beyond the abundance
• The Origin of Weak Lensing Convergence Peaks
• The Accuracy of Weak Lensing Simulations
• Weak lensing by voids in weak lensing maps
• Cosmological test of gravity using weak lensing voids
• Effects of baryons on weak lensing peak statistics
• Simulations and cosmological inference: A statistical model for power spectra means and covariances
• KiDS-450: Enhancing cosmic shear with clipping transformations
• Weak lensing clusters from HSC survey first-year data: Mitigating the dilution effect of foreground and cluster member galaxies
• The self similarity of weak lensing peaks
• The Correspondence between Convergence Peaks from Weak Lensing and Massive Dark Matter Haloes
• An adapted filter function for density split statistics in weak lensing

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• The MillenniumTNG Project: The impact of baryons and massive neutrinos on high-resolution weak gravitational lensing convergence maps
• Machine Learning for Observational Cosmology
• Cosmology from weak lensing peaks and minima with Subaru Hyper Suprime-Cam survey first-year data
• Enhancing cosmic shear with the multi-scale lensing PDF
• The FLAMINGO project: Baryonic impact on weak gravitational lensing convergence peak counts
• Cosmological constraints using Minkowski functionals from the first year data of the Hyper Suprime-Cam
• The FLAMINGO project: cosmology with the redshift dependence of weak gravitational lensing peaks
• Simulation-based inference has its own Dodelson-Schneider effect (but it knows that it does)
• Peaks in weak lensing mass maps for cluster astrophysics and cosmology
• Clustering of the extreme: A theoretical description of weak lensing critical points power spectra in the mildly nonlinear regime
• Non-linear infusion of intrinsic alignment and source clustering: impact on non-Gaussian cosmic shear statistics