Abstract
Nonlinear gravitational effects of large-scale local inhomogeneities on cosmic microwave background (CMB) anisotropies are studied, based on the relativistic second-order theory of perturbations in nonzero- flat cosmological models, which has been analytically derived by the present author, and on the second-order formula of CMB anisotropies derived by Mollerach and Matarrese. In this paper we derive the components of the CMB anisotropy power spectra in the range of which are caused by asymmetric local inhomogeneities on scales of 300 Mpc. Using our results it is found that there is a possibility to explain the small north-south asymmetry of CMB anisotropies which has recently been observed.
- Received 8 May 2005
DOI:https://doi.org/10.1103/PhysRevD.72.043526
©2005 American Physical Society