Angular Spectra of Polarized Galactic Foregrounds

Details Angular Spectra of Polarized Galactic Foregrounds Angular Spectra of Polarized Galactic Foregrounds

2003-06-09

arxiv.org/abs/astro-ph/0306183v1

New Astron.Rev. 47 (2003) 1143-1149

Astronomy and Astrophysics

Astrophysics

11 pages, 1 figure; To be published in the proceedings of "The Cosmic Microwave Background and its Polarization", New Astronom

Scientific paper

It is believed that magnetic field lines are twisted and bend by turbulent motions in the Galaxy. Therefore, both Galactic synchrotron emission and thermal emission from dust reflects statistics of Galactic turbulence. Our simple model of Galactic turbulence, motivated by results of our simulations, predicts that Galactic disk and halo exhibit different angular power spectra. We show that observed angular spectra of synchrotron emission are compatible with our model. We also show that our model is compatible with the angular spectra of star-light polarization for the Galactic disk. Finally, we discuss how one can estimate polarized microwave emission from dust in the Galactic halo using star-light polarimetry.

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