Reionization and the cosmic microwave background in an open universe

Details Reionization and the cosmic microwave background in an open universe Reionization and the cosmic microwave background in an open universe

Mar 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...441....1p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 441, no. 1, p. 1-9

Mathematics

Logic

7

Astronomical Models, Background Radiation, Cosmology, Galactic Evolution, Ionization, Microwaves, Red Shift, Universe, Anisotropic Media, Baryons, Photon-Electron Interaction, Quadrupoles, Statistical Distributions

Scientific paper

If the universe was reionized at high reshift (z greater than or approximately equal to 30) or never recombined, then photon-electron scattering can erase fluctuations in the cosmic microwave background at scales less than or approximately equal to 1 deg. Peculiar motion at the surface of last scattering will then have given rise to new anisotropy at the 1 min level through the Vishniac effect. Here the observed fluctuations in galaxy counts are extrapolated to high redshifts using linear theory, and the expected anisotropy is computed. The predicted level of anisotropies is a function of Omega0 and the ratio of the density in ionized baryons to the critical density and is shown to depend strongly on the large- and small-scale power. It is not possible to make general statements about the viability of all reionized models based on current observations, but it is possible to rule out specific models for structure formation, particularly those with high baryonic content or small-scale power. The induced fluctuations are shown to scale with cosmological parameters and optical depth.

Affiliated with

Also associated with

No associations

Rating

Reionization and the cosmic microwave background in an open universe does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Reionization and the cosmic microwave background in an open universe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reionization and the cosmic microwave background in an open universe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-884335