Simultaneous determination of the cosmic birefringence and miscalibrated polarization angles II: Including cross frequency spectra

Jun 29, 2020
14 pages
Published in:
  • PTEP 2020 (2020) 10, 103E02
  • Published: Oct 9, 2020
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Abstract: (Oxford University Press)
We develop a strategy to determine the cosmic birefringence and miscalibrated polarization angles simultaneously using the observed |EBEB| polarization power spectra of the cosmic microwave background and the Galactic foreground emission. We extend the methodology of Y. Minami et al. (Prog. Theor. Exp. Phys. 2019, 083E02, 2019), which was developed for auto-frequency power spectra, by including cross-frequency spectra. By fitting one global birefringence angle and independent miscalibration angles at different frequency bands, we determine both angles with significantly smaller uncertainties (by more than a factor of two) compared to the auto spectra.
Note:
  • 14 pages, 2 figures, 3 tables
  • E63 Cosmic background radiations
  • E65 Probes of cosmology
  • F11 Radiation from galactic objects
  • F14 Cosmic microwave background and extragalactic background lights