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Polarization Angular Spectra of Galactic Synchrotron Emission on Arcminute Scales

Citation

Tucci, M and Carretti, E and Cecchini, S and Nicastro, L and Fabbri, R and Gaensler, BM and Dickey, JM and McClure-Griffiths, NM, Polarization Angular Spectra of Galactic Synchrotron Emission on Arcminute Scales, The Astrophysical Journal, 579, (2) pp. 607-615. ISSN 0004-637X (2002) [Refereed Article]

DOI: doi:10.1086/342793

Abstract

We study the angular power spectra of the polarized component of the Galactic synchrotron emission in 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 seem to be affected by Faraday rotation produced in compact foreground screens. A different behavior is shown by the angular spectrum of the polarized intensity PI = (Q2 + U 2)1/2. This is well fitted by a power law (C PI" ∝ "-αPI) with slope ∼1.7, which agrees with higher frequency results and can probably be more confidently extrapolated to the cosmological window.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Dickey, JM (Professor John Dickey)
ID Code:46587
Year Published:2002
Web of Science® Times Cited:26
Deposited By:Physics
Deposited On:2007-08-28
Last Modified:2011-08-02
Downloads:0

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