The Origin of Parity Violation in Polarized Dust Emission and Implications for Cosmic Birefringence

  title={The Origin of Parity Violation in Polarized Dust Emission and Implications for Cosmic Birefringence},
  author={Susan E. Clark and Chang-Goo Kim and J. Colin Hill and Brandon S. Hensley},
  journal={The Astrophysical Journal},
Recent measurements of Galactic polarized dust emission have found a nonzero TB signal, a correlation between the total intensity and the B-mode polarization component. We present evidence that this parity-odd signal is driven by the relative geometry of the magnetic field and the filamentary interstellar medium in projection. Using neutral hydrogen morphology and Planck polarization data, we find that the angle between intensity structures and the plane-of-sky magnetic field orientation is… 
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