Gravitational lensing and the cosmic microwave background

Details Gravitational lensing and the cosmic microwave background Gravitational lensing and the cosmic microwave background

Feb 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403..471c&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 403, no. 2, p. 471-475.

Statistics

Computation

31

Gravitational Lenses, Microwaves, Relic Radiation, Anisotropy, Computational Astrophysics, Density Distribution

Scientific paper

We present calculations of the effect of the gravitational lensing of the cosmic microwave photons, produced by linear density perturbations, on the anisotropies of the cosmic microwave background for several popular cosmological scenarios. The results is an appreciable amplification of the order of 20 percent for Delta-T/T in present experiments of several arcminute scales, whereas previous work dealing with nonlinear density fluctuations find a negligible amplification. On smaller scales of a few arcminutes (less than 3 arcmin) the amplification can be even higher than 100 percent for the same scenarios.

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