2002/07/11 by M. Tucci, E. Carretti, S. Cecchini +6
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Cosmic Phenomena #Faraday cage #Faraday effect #Galactic plane #Galaxies: Formation, Evolution, Phenomena #Galaxy #Laser #Linear polarization #Magnetic field #Optics #Physics #Polarization (electrochemistry) #Radio Astronomy Observations and Technology #Spectral line #Synchrotron #Telescope #astro-ph
paper · pdf · doi:10.1086/342793
published as Astrophys.J. 579 (2002) 607-615 · 11 pages, 6 figures, accepted for publication in ApJ
arxiv created 2002/07/11 · openalex publication_date 2002/11/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We study the angular power spectra of the polarized component of the Galactic synchrotron emission in the 28 deg 2 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 = ( Q 2 + U 2 ) 1/2 . This is well fitted by a power law ( C PIℓ ∝ ℓ −α PI ) with slope ~1.7, which agrees with higher frequency results and can probably be more confidently extrapolated to the cosmological window.