Angular spectra of Galactic polarized synchrotron emission at Arcmin scales

Details Angular spectra of Galactic polarized synchrotron emission at Arcmin scales Angular spectra of Galactic polarized synchrotron emission at Arcmin scales

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..609...60t&link_type=abstract

ASTROPHYSICAL POLARIZED BACKGROUNDS: Workshop on Astrophysical Polarized Backgrounds, held 9-12 October, 2001 in Bologna Italy.

Physics

4

Radiation Mechanisms, Polarization, Interstellar Dust Grains, Diffuse Emission, Infrared Cirrus, Physical Properties, Radio, Microwave

Scientific paper

We study the polarization angular spectra of the Galactic synchrotron emission from the 28-deg2 Test Region of the Southern Galactic Plane Survey at 1.4 GHz. These data were obtained by the Australia Telescope Compact Array and allow us to investigate angular power spectra down to arcminute scales. We find that, at this frequency, the polarization spectra for E- and B-modes are strongly affected by Faraday rotation produced in compact foreground screens. A different behavior is shown by the angular spectrum of the polarized intensity PI=Q2+U2. This is well fitted by a power law (CPI~-αPI) with slope ~1.7, which agrees with higher frequency results and can probably be more confidently extrapolated to the cosmological window. .

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