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

DOI DOI PDF PDF 12 Citations 26 References Open Access
  • Yuto Minami
    High Energy Accelerator Research Organization, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan
  • Eiichiro Komatsu
    Max Planck Institute for Astrophysics, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany

Description

<jats:title>Abstract</jats:title> <jats:p>We develop a strategy to determine the cosmic birefringence and miscalibrated polarization angles simultaneously using the observed $EB$ 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.</jats:p>

Journal

Citations (12)*help

See more

References(26)*help

See more

Related Projects

See more

Keywords

Report a problem

Back to top