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Peaks in weak lensing mass maps for cluster astrophysics and cosmology

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arxiv 2409.12361 v2 pith:DDHJF5HZ submitted 2024-09-18 astro-ph.CO

classification astro-ph.CO
keywords clusterclustersshear-selectedlensingweakselectionanalysisastrophysics
verification ladder T0 review T1 audit T2 compute T3 formal

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Clusters of galaxies can be identified from peaks in weak lensing aperture mass maps constructed from weak lensing shear catalogs. Such purely gravitational cluster selection considerably differs from traditional cluster selections based on baryonic properties of clusters. In this review, we present the basics and applications of weak lensing shear-selected cluster samples. Detailed studies of baryonic properties of shear-selected clusters shed new light on cluster astrophysics. The purely gravitational selection suggests that the selection function can be quantified more easily and robustly, which is crucial for deriving accurate cosmological constraints from the abundance of shear-selected clusters. The recent advance of shear-selected cluster studies is driven by the Subaru Hyper Suprime-Cam survey, in which more than 300 shear-selected clusters with the signal-to-noise ration greater than 5 are identified. It is argued that various systematic effects in the cosmological analysis can be mitigated by carefully choosing the set-up of the analysis, including the choice of the kernel functions and the source galaxy sample.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. LoVoCCS. III. Third Generation Pipeline & The Hercules Supercluster

    astro-ph.GA 2026-07 conditional novelty 6.0 of 10

    A new LSST-pipeline-based reduction and multi-plane weak-lensing analysis measures the Hercules supercluster at 8.9 x 10^14 solar masses and attributes Abell 2147's inflated dynamical mass to a recent pericenter passage.

  2. Diffusion-based mass map reconstruction from weak lensing data

    astro-ph.CO 2025-02 conditional novelty 6.0 of 10

    A single unconditioned diffusion model plus a rescaled Diffusion Posterior Sampling step reconstructs weak lensing mass maps whose power spectra and non-Gaussian statistics match the simulations.

  3. The FLAMINGO project: cosmology with the redshift dependence of weak gravitational lensing peaks

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    The redshift distribution of high-SNR weak lensing peaks traces massive haloes and is insensitive to baryonic physics, making it a promising cosmological probe for Stage IV surveys.

  4. Cosmology with Galaxy Clusters

    astro-ph.CO 2025-05 unverdicted

    A review of galaxy cluster cosmology that summarizes detection, mass calibration, and current Omega_m and sigma_8 constraints without presenting new results.

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