Late-time anisotropy and radiation drag within the cosmic microwave background

Details Late-time anisotropy and radiation drag within the cosmic microwave background Late-time anisotropy and radiation drag within the cosmic microwave background

2010-04-02

arxiv.org/abs/1004.0328v1

Physics

General Physics

3 pages, 0 figures

Scientific paper

I investigate the effect of the radiation drag force on a star moving relative to the Cosmic Microwave Background (CMB) at z = 0. As expected, the perturbation is extremely small and has no observable consequences on orbital motions of stars within a galaxy or on orbital motions of galaxies within a cluster. The energy dissipated by cubic meter in a galaxy via this mechanism is 10^{14} smaller than the energy density of the CMB and, thus, is a negligible source of anisotropy. However, from the last scattering surface to population III stars (30 < z < 1000), radiation drag on particles may have played a major role in the apparition of anisotropy and rapid formation of densities.

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