Microwave background distortions from domain walls.

Details Microwave background distortions from domain walls. Microwave background distortions from domain walls.

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991nuphb.351..645g&link_type=abstract

Nuclear Physics B, Part. Phys., Vol. 351, No. 3, p. 645 - 661

Physics

Nuclear Physics

3

Scientific paper

Domain walls arising in a cosmic phase transition after decoupling were recently proposed as seeds for the formation of large-scale structure. The distortion induced in the microwave background radiation is calculated in dependence of the wall thickness, surface density, scalar field potential, cosmic redshift and the velocity of the wall. The authors find that the maximal redshift distortion for both spherical and planar walls is of the order πGσH0-1, where σ is the surface energy density and H0 the Hubble parameter. They also find that, for a wall thickness smaller than the horizon, walls can be treated as infinitely thin, i.e. the redshift distortion is independent of the wall thickness and the specific form of the scalar potential. For planar walls moving with a Lorentz-factor γ the redshift distortion is enhanced by γ3.

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