The Parkes Galactic Meridian Survey: The Polarized Galaxy From Plane To Pole

Details The Parkes Galactic Meridian Survey: The Polarized Galaxy From Plane To Pole The Parkes Galactic Meridian Survey: The Polarized Galaxy From Plane To Pole

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.2102h&link_type=abstract

American Astronomical Society Meeting 210, #21.02; Bulletin of the American Astronomical Society, Vol. 39, p.123

Astronomy and Astrophysics

Astronomy

1

Scientific paper

The Parkes Galactic Meridian Survey (PGMS) is a radiopolarimetric survey at 2.3 GHz of a 5-degree wide strip along Galactic meridian l = 254 degrees, at all negative Galactic latitudes. Its data products are polarized and total emission in 30 adjacent 8 MHz wide frequency bands around 2.3 GHz. Eventually, the survey will be calibrated down to an absolute flux level, taking into account ground radiation spillover and instrumental polarization, which will enable Faraday rotation studies. In this paper, we will introduce the survey and present preliminary results.
The scientific goals of the PGMS are twofold:
Firstly, the polarized synchrotron emission from the Milky Way is a unique probe for magnetic fields and turbulence in the Galaxy. Although the Galactic plane is being studied quite extensively, much less is known about the regions out of the plane, especially at frequencies where Faraday rotation plays a minor role. The PGMS can give insight into the structure and magnetic fields in the Galactic thick disk, halo and disk-halo connection.
Secondly, the PGMS is an excellent preparatory study for Cosmic Microwave Background Polarization studies, for which Galactic synchrotron radiation is a dominating foreground contamination. The PGMS will be used to characterize this foreground, its fluctuations and latitude dependence.

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