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

Abstract 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. T...

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Bibliographic Details
Published inProgress of theoretical and experimental physics Vol. 2020; no. 10
Main Authors Minami, Yuto, Komatsu, Eiichiro
Format Journal Article
LanguageEnglish
Published Oxford Oxford University Press 01.10.2020
Subjects
F14
E63
E65
F11
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Summary:Abstract 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.
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content type line 14
ISSN:2050-3911
2050-3911
DOI:10.1093/ptep/ptaa130