Gravitational lens effect on anisotropies of the cosmic microwave background
Open Access
- 1 September 1989
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 240 (2) , 415-420
- https://doi.org/10.1093/mnras/240.2.415
Abstract
We discuss the general feature of the gravitational lens effect on anisotropies of cosmic microwave background radiation. Provided that the characteristic angular scale associated with the gravitational lens effect is comparable to the coherence angle of the cosmic microwave anisotropy, we find that the anisotropies on scales smaller than a characteristic coherence angle associated with the lens distribution may be enhanced, while those on larger scales are suppressed as usually expected. That this conclusion is physically reasonable can be rather easily understood.Keywords
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