Faraday scaling and the Bicep2 observations
arXiv:1404.3974 · doi:10.1103/PhysRevD.90.041301
Abstract
As repeatedly speculated in the past, the linear polarization of the Cosmic Microwave Background can be rotated via the Faraday effect. An economic explanation of the recent Bicep2 observations, not relying on long-wavelength tensor modes of the geometry, would stipulate that the detected B mode comes exclusively from a Faraday rotated E mode polarization. We show hereunder that this interpretation is ruled out by the existing upper limits on the B mode polarization obtained by independent experiments at observational frequencies much lower than the operating frequency of the Bicep2 experiment. We then derive the fraction of the observed B mode polarization ascribable to the Faraday effect and suggest a dedicated experimental strategy for its detection.
8 pages, no figures
References in corpus (48)
- First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
- Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
- Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
- BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
- Three Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Polarization Analysis
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Power Spectra and WMAP-Derived Parameters
- Detection of Polarization in the Cosmic Microwave Background using DASI
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Are There Cosmic Microwave Background Anomalies?
- Seven-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Galactic Foreground Emission
- Improved measurements of the temperature and polarization of the CMB from QUaD
- A Measurement of the CMB <EE> Spectrum from the 2003 Flight of BOOMERANG
- BICEP2 II: Experiment and Three-Year Data Set
- Faraday Rotation of Microwave Background Polarization by a Primordial Magnetic Field
- Planck 2013 results. IX. HFI spectral response
- DASI Three-Year Cosmic Microwave Background Polarization Results
- Faraday Rotation of the Cosmic Microwave Background Polarization by a Stochastic Magnetic Field
- Parity violation constraints using 2006-2007 QUaD CMB polarization spectra
- Second and third season QUaD CMB temperature and polarization power spectra
- Implications of the Cosmic Background Imager Polarization Data
- Measuring Polarization with DASI
- First Season QUIET Observations: Measurements of CMB Polarization Power Spectra at 43 GHz in the Multipole Range 25 <= ell <= 475
- Second Season QUIET Observations: Measurements of the CMB Polarization Power Spectrum at 95 GHz
- Faraday Rotation of the Cosmic Microwave Background Polarization and Primordial Magnetic Field Properties
- Effects of a Primordial Magnetic Field on Low and High Multipoles of the CMB
- MAXIPOL: Cosmic Microwave Background Polarimetry Using a Rotating Half-Wave Plate
- B polarization of the CMB from Faraday rotation
- New Measurements of Fine-Scale CMB Polarization Power Spectra from CAPMAP at Both 40 and 90 GHz
- Faraday Rotation Limits on a Primordial Magnetic Field from WMAP Five-Year Data
- Spatial variations in the spectral index of polarized synchrotron emission in the 9 yr WMAP sky maps
- Self-Calibration of BICEP1 Three-Year Data and Constraints on Astrophysical Polarization Rotation
- First season QUaD CMB temperature and polarization power spectra
- Cosmic microwave background polarization, Faraday rotation and stochastic gravity-waves backgrounds
- Depolarization of the cosmic microwave background by a primordial magnetic field and its effect upon temperature anisotropy
- Faraday rotation, stochastic magnetic fields and CMB maps
- Degree-Scale CMB Polarization Measurements from Three Years of BICEP1 Data
- Can primordial magnetic fields be the origin of the BICEP2 data?
- Primordial Magnetism in the CMB: Exact Treatment of Faraday Rotation and WMAP7 Bounds
- MAXIPOL: Data Analysis and Results
- Magnetized birefringence and CMB polarization
- Fluctuations of cosmological birefringence and the effect on CMB B-mode polarization
- Searching for primordial magnetism with multi-frequency CMB experiments
- Constraining primordial magnetic fields with CMB polarization experiments
- Cosmic polarimetry in magnetoactive plasmas
- Primordial Magnetism in CMB B-modes
- 1.4 GHz polarimetric observations of the two fields imaged by the DASI experiment
- Scaling laws and sum rules for the B-mode polarization
- Tensor B mode and stochastic Faraday mixing
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