Microwave sky and the local Rees-Sciama effect

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Rakic , A , Räsänen , S & Schwarz , D 2006 , ' Microwave sky and the local Rees-Sciama effect ' , Monthly Notices of the Royal Astronomical Society , vol. 369 , no. 1 , pp. L27-L31 . https://doi.org/10.1111/j.1745-3933.2006.00167.x

Title: Microwave sky and the local Rees-Sciama effect
Author: Rakic, Aleksandar; Räsänen, Syksy; Schwarz, Dominik
Contributor: University of Helsinki, Department of Physics
Date: 2006-04-26
Language: eng
Number of pages: 5
Belongs to series: Monthly Notices of the Royal Astronomical Society
ISSN: 0035-8711
URI: http://hdl.handle.net/10138/310245
Abstract: The microwave sky shows unexpected features at the largest angular scales, among them the alignments of the dipole, quadrupole and octopole. Motivated by recent X-ray cluster studies, we investigate the possibility that local structures at the 100 h^(-1) Mpc scale could be responsible for such correlations. These structures give rise to a local Rees-Sciama contribution to the microwave sky that may amount to Delta T/T ~ 10^(-5) at the largest angular scales. We model local structures by a spherical overdensity (Lemaitre-Tolman-Bondi model) and assume that the Local Group is falling toward the centre. We superimpose the local Rees-Sciama effect on a statistically isotropic, gaussian sky. As expected we find alignments among low multipoles, but a closer look reveals that they do not agree with the type of correlations revealed by the data.
Subject: 114 Physical sciences
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