Inhomogeneous reionization and the polarization of the cosmic microwave background

Details Inhomogeneous reionization and the polarization of the cosmic microwave background Inhomogeneous reionization and the polarization of the cosmic microwave background

1999-08-04

arxiv.org/abs/astro-ph/9908033v2

Astrophys.J. 527 (1999) L1

Astronomy and Astrophysics

Astrophysics

10 pages, 2 eps figures, final version accepted for publication in ApJ Letters

Scientific paper

10.1086/312392

In a universe with inhomogeneous reionization, the ionized patches create a second order signal in the cosmic microwave background polarization anisotropy. This signal originates in the coupling of the free electron fluctuation to the quadruple moment of the temperature anisotropy. We examine the contribution from a simple inhomogeneous reionization model and find that the signal from such a process is below the detectable limits of the Planck Surveyor mission. However t he signal is above the fundamental uncertainty limit from cosmic variance, so th at a future detection with a high accuracy experiment on sub-arcminute scales is possible.

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