Microwave background anisotropies and non-linear structures II. Numerical computations

Abstract

A new method for modelling spherically symmetric inhomogeneities is applied to the formation of clusters in an expanding Universe. We impose simple initial velocity and density perturbations of finite extent and we investigate the subsequent evolution of the density field. Photon paths are also calculated, allowing a detailed consideration of gravitational lensing effects and microwave background anisotropies induced by the cluster. We apply the method to modelling high-redshift clusters and, in particular, we consider the reported microwave decrement observed towards the quasar pair PC1643+4631 A&B. We also consider the effect on the primordial microwave background power spectrum due to gravitational lensing by a population of massive high-redshift clusters.

15 pages, 23 figures; Monthly Notices of the Royal Astronomical Society (MNRAS), in press

References in corpus (8)

• The Cores of Dark Matter Dominated Galaxies: theory vs. observations
• Gravity, Gauge Theories and Geometric Algebra
• A Massive Cluster of Galaxies at z = 0.996
• Intracluster Comptonization of the CMB: Mean Spectral Distrortion and Cluster Number Counts
• The Effect of Weak Gravitational Lensing on the Cosmic Microwave Background Anisotropy: Flat versus Open Universes
• Detection of a Small Scale Cosmic Background Anisotropy at 3.6 cm
• A deep ROSAT PSPC observation towards the CMB decrement close to PC1643+4631 A & B: no cluster X-ray emission
• Secondary gravitational anisotropies in open universes

Cited by in corpus (8)

• Secondary anisotropies of the CMB
• Full-sky map of the ISW and Rees-Sciama effect from Gpc simulations
• Did WMAP see Moving Local Structures?
• Observations of the Corona Borealis supercluster with the superextended Very Small Array: further constraints on the nature of the non-Gaussian CMB cold spot
• An alternative approach to modelling a cosmic void and its effect on the cosmic microwave background
• Dynamics of a spherical object of uniform density in an expanding universe
• A study of the galaxy redshift distribution toward the cosmic microwave background cold spot in the Corona Borealis supercluster
• Microwave background anisotropies due to non-linear structures in open and Lambda universes