Cosmic microwave background anisotropies: Nonlinear dynamics

摘要: We develop a new approach to local nonlinear effects in cosmic microwave background anisotropies, and discuss the qualitative features of these effects. New couplings baryonic velocity radiation multipoles are found, arising from Thomson scattering also find shear effect on small angular scales. The full set evolution constraint equations is derived, including generalizations multipole hierarchy, dynamics multi-fluids. These govern anisotropies any inhomogeneous spacetime, but their main application second-order universe that close Friedmann models. Qualitative analysis given here, quantitative calculations taken up further papers.