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Modelling Baryonic Effects on Galaxy Cluster Mass Profiles

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arxiv 1711.06366 v2 pith:66TNA3BN submitted 2017-11-17 astro-ph.CO astro-ph.GA

Masato Shirasaki , Erwin T. Lau , Daisuke Nagai This is my paper
classification astro-ph.COastro-ph.GA
keywords clustermassgalaxybaryonicclustersmodelprofilesconcentration
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Gravitational lensing is a powerful probe of the mass distribution of galaxy clusters and cosmology. However, accurate measurements of the cluster mass profiles are limited by uncertainties in cluster astrophysics. In this work, we present a physically motivated model of baryonic effects on the cluster mass profiles, which self-consistently takes into account the impact of baryons on the concentration as well as mass accretion histories of galaxy clusters. We calibrate this model using the Omega500 hydrodynamical cosmological simulations of galaxy clusters with varying baryonic physics. Our model will enable us to simultaneously constrain cluster mass, concentration, and cosmological parameters using stacked weak lensing measurements from upcoming optical cluster surveys.

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  1. Weak-lensing mass calibration of \emph{Planck} Sunyaev--Zel'dovich clusters with HSC-SSP Year~3

    astro-ph.CO 2026-06 unverdicted novelty 5.0 of 10

    Weak-lensing calibration of 19 Planck SZ clusters with HSC Year 3 yields 1-b = 0.73^{+0.10}_{-0.11} at z_eff ~0.24 after forward-modeling selection, Eddington bias, and miscentering.

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