Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.243..353l&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 243, April 1, 1990, p. 353-361.
Astronomy and Astrophysics
Astronomy
32
Anisotropy, Gravitational Lenses, Microwaves, Relic Radiation, Coherent Radiation, Dark Matter, Image Processing
Scientific paper
A thorough analytic investigation of the influence of gravitational lensing on the anisotropy correlation function of the cosmic background radiation is given. Particular attention is paid to the effects of coherent versus incoherent deflections and the resultant enhancement or dilution of the temperature fluctuations. At scales less than the intrinsic anisotropy coherence angle, substantial enhancement can result, leading to the possibility of constraining the (dark) matter distribution if this excess is not detected. At larger angles, mild dilution is found. The methods developed can be applied very generally to problems where the source positions might not coincide with the observed images. Possible consequences for the X-ray background and quasar correlation function are discussed.
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