Gravitational lensing of fluctuations in the microwave background radiation

Details Gravitational lensing of fluctuations in the microwave background radiation Gravitational lensing of fluctuations in the microwave background radiation

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.239..195c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 239, July 1, 1989, p. 195-200.

Statistics

Computation

59

Astronomical Models, Gravitational Lenses, Relic Radiation, Autocorrelation, Baryons, Computational Astrophysics, Dark Matter, Galactic Evolution

Scientific paper

The effects of gravitational lensing by clustered matter on fluctuations in the microwave background radiation are investigated. A simple expression is derived for the temperature autocorrelation function which shows that lensing produces a small enhancement to the variance expected in a beam switching experiment. For most models of galaxy formation, the effects of gravitational lensing on the temperature fluctuations are negligible. The conclusions disagree strongly with those of Kashlinsky who argues that gravitational lensing would erase fluctuations in the microwave background on arc-minute scales.

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