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Today's colloquium: Polarization as a probe of magnetized gas in and around galaxies

Submitter: Ann Mao (Max Planck Institute for Radio Astronomy)
Description: Wide-band radio polarimetry is a unique probe of magnetized gas in galaxies. Faraday rotation and depolarization effects can be used to derive both large-scale and small-scale magnetic field properties. In this talk, I will present new Jansky Very Large Array polarization observations of the Whirlpool galaxy (see image above) and what they tell us about the large-scale magnetic field and turbulence in M51's halo. In addition, I will describe on-going efforts to measure magnetic fields in HVCs and interacting galaxies.
Copyright: Mao et al. 2015
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