Overview of Secondary Anisotropies of the CMB

Details Overview of Secondary Anisotropies of the CMB Overview of Secondary Anisotropies of the CMB

1999-04-19

arxiv.org/abs/astro-ph/9904235v1

Astronomy and Astrophysics

Astrophysics

9 LaTeX pages, 1 postscript figure, 1 table. Uses paspconf.sty. Color figure and further links available at http://www.astro.p

Scientific paper

While the major contribution to the Cosmic Microwave Background (CMB) anisotropies are the sought-after primordial fluctuations produced at the surface of last scattering, other effects produce secondary fluctuations at lower redshifts. These secondary fluctuations must be carefully accounted for, in order to isolate primordial fluctuations. In addition, they are interesting in their own right, since they provide a wealth of information on the geometry and local properties of the universe. Here, I survey the different sources of secondary anisotropies and extragalactic foregrounds of the CMB. I show their relative importance on the multipole-frequency plane. I discuss in particular their impact in the future CMB missions MAP and Planck Surveyor.

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