Polarization transport in anisotropic universes

Details Polarization transport in anisotropic universes Polarization transport in anisotropic universes

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...217..353a&link_type=abstract

Astrophysical Journal, Part 1, vol. 217, Oct. 15, 1977, p. 353-357. Research supported by the Consiglio Nazionale delle Ricerch

Physics

Optics

5

Anisotropic Media, Background Radiation, Cosmology, Polarization Characteristics, Transport Properties, Microwave Emission, Numerical Integration, Red Shift, Relativity, Universe

Scientific paper

The transport equations for the intensity and polarization of the microwave background radiation, including first-order corrections to geometrical optics, are derived and integrated. In the case of an axisymmetric Bianchi type I universe it is shown that the first-order corrections are always negligibly small. Hence polarization is essentially unchanged, and the intensity is, in fact, exactly conserved (except for redshift effects) by propagation over cosmological distances under the assumption that no Thomson scattering occurs. The implications of this result for more general situations are discussed.

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