Self-similarity of the mass distribution in rich galaxy clusters up z~1 tracked with weak lensing

Abstract

In the standard theory of growth of the nonbaryonic dark matter, cosmic structures form hierarchically and self-similarly from smaller clumps. The assembly merger tree goes from the linear perturbations in the early universe to highly non linear structures at late times. Gravity is the driving force and self-similarity should inform cosmic haloes. However, it is unclear if apparent anomalies at non-linear scales are due to either baryonic or new physics. Here, I show that the mass distribution of rich haloes evolve self-similarly at least since the universe was 5.7 Gyr old. Using gravitational weak lensing, I constrain the mass profiles of galaxy clusters with M_200c >~ 2 x 10^14 M_Sun that were optically detected in the HSC-SSP survey in the redshift range 0.2 <= z < 1.0. Cluster self-similarity confirms the standard theory of growth in the non-linear regime. Clusters are still growing but neither violent mergers nor matter slowly falling in from the cosmic web disrupt self-similarity, which is in place well before the halo formation time. Dark matter growth can fit the fossil cosmic microwave background as well as young, very massive haloes. Looking with next generation surveys at scales in clusters where self-similarity breaks could pose a new challenge to dark matter.

10 pages; in press on A&A

References in corpus (23)

• Array Programming with NumPy
• Why your model parameter confidences might be too optimistic -- unbiased estimation of the inverse covariance matrix
• Rotation-Dependent Catastrophic Disruption of Gravitational Aggregates
• The Canadian Cluster Comparison Project: detailed study of systematics and updated weak lensing masses
• CLASH: Weak-Lensing Shear-and-Magnification Analysis of 20 Galaxy Clusters
• A cluster finding algorithm based on the multiband identification of red sequence galaxies
• Dark matter halo properties of GAMA galaxy groups from 100 square degrees of KiDS weak lensing data
• Cluster-galaxy weak lensing
• The SRG/eROSITA all-sky survey: Cosmology constraints from cluster abundances in the western Galactic hemisphere
• Cosmological Constraints from DES Y1 Cluster Abundances and SPT Multi-wavelength data
• Weak Lensing by Galaxies in Groups and Clusters: I.--Theoretical Expectations
• AMICO galaxy clusters in KiDS-DR3: cosmological constraints from counts and stacked weak-lensing
• Mass and galaxy distributions of four massive galaxy clusters from Dark Energy Survey Science Verification data
• Euclid Preparation IV. Impact of undetected galaxies on weak-lensing shear measurements
• Euclid Preparation. XXVIII. Forecasts for ten different higher-order weak lensing statistics
• Self-Similar Solutions of Triaxial Dark Matter Halos
• Secondary infall and dark matter haloes
• Creating Jackknife and Bootstrap estimates of the covariance matrix for the two-point correlation function
• Evolution of the Thermodynamic Properties of Clusters of Galaxies out to Redshift of 1.8
• Cosmological Constraints from Galaxy Cluster Sparsity, Cluster Gas Mass Fraction and Baryon Acoustic Oscillations Data
• The thermalisation of massive galaxy clusters
• Internal dark matter structure of the most massive galaxy clusters
• Forecasting cosmological parameter constraints using multiple sparsity measurements as tracers of the mass profiles of dark matter haloes