Probing the Galactic Magnetic Field with the Allen Telescope Array

Details Probing the Galactic Magnetic Field with the Allen Telescope Array Probing the Galactic Magnetic Field with the Allen Telescope Array

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21540301l&link_type=abstract

American Astronomical Society, AAS Meeting #215, #403.01; Bulletin of the American Astronomical Society, Vol. 42, p.223

Astronomy and Astrophysics

Astronomy

Scientific paper

Radio waves are encoded with rich physical information by their propagation through magneto-ionized media. One such effect is Faraday rotation, the rotation of the polarization angle with changing wavelength. The power of Faraday rotation to measure Galactic magnetic structure was demonstrated vividly in rotation measure maps presented by Taylor et al. (2009). We test those results with new observations of 41 bright polarized sources with the Allen Telescope Array (ATA). The flexible digital system of the ATA makes ideal for performing "rotation measure synthesis", a new technique for measuring complex Faraday rotation effects. We describe the results of this analysis and implications for the structure of the Galaxy's magnetic structure and field strength.

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