Galactic interstellar filaments as probed by LOFAR and Planck

Recent radio observations with the Low Frequency Array (LOFAR) have shown striking, very thin filamentary structures in linear polarization that extend over more than 4 degrees across the sky. In parallel, the Planck Satellite team has been able to construct a map of the orientation of the magnetic field of our Galaxy across the sky using their dust all sky polarisation maps. In general, the two datasets are thought to probe very different physical quantities. In this talk I report on the surprising, yet clear, correlation between the filamentary structures, detected with LOFAR, and the magnetic field orientation, probed by the Planck satellite.

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