Polarization fluctuations due to extragalactic sources

Details Polarization fluctuations due to extragalactic sources Polarization fluctuations due to extragalactic sources

1999-08-06

arxiv.org/abs/astro-ph/9908058v1

Astronomy and Astrophysics

Astrophysics

15 pages LaTeX file, 3 postscript figures. Uses elsart.sty and elsart.cls Accepted for publication in New Astronomy

Scientific paper

10.1016/S1384-1076(99)00039-1

We have derived the relationship between polarization and intensity fluctuations due to point sources. In the case of a Poisson distribution of a population with uniform evolution properties and constant polarization degree, polarization fluctuations are simply equal to intensity fluctuations times the average polarization degree. Conservative estimates of the polarization degree of the classes of extragalactic sources contributing to fluctuations in the frequency ranges covered by the forthcoming space missions MAP and Planck Surveyor indicate that extragalactic sources will not be a strong limiting factor to measurements of the polarization of the Cosmic Microwave Background.

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