Year: 2017
Type: article
Abstract: We present new limits on the amplitude of potential primordial magnetic fields (PMFs) using temperature and polarization measurements of the cosmic microwave background (CMB) from Planck, the BICEP2/Keck Array, Polarbear, and SPTpol. We reduce twofold the 95% confidence upper limit on the CMB anisotropy power due to a nearly scale-invariant PMF, with an allowed B-mode power at ℓ = 1500 of D ℓ = 1500 BB < 0.071 μ K 2 for Planck versus D ℓ = 1500 BB < 0.034 μ K 2 for the combined data set. We also forecast the expected limits from soon-to-deploy CMB experiments (like SPT-3G, Adv. ACTpol, or the Simons Array) and the proposed CMB-S4 experiment. Future CMB experiments should dramatically reduce the current uncertainties by one order of magnitude for the near-term experiments and two orders of magnitude for the CMB-S4 experiment. The constraints from CMB-S4 have the potential to rule out much of the parameter space for PMFs.
Source: The Astrophysical Journal
Authors: Dylan R. Sutton, Chang Feng, Christian L. Reichardt
Institutions: The University of Melbourne, University of California, Irvine
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G1286236842, G1632040200, Studying Inflation and Neutrinos with the Cosmic Microwave Background, G3083819904, G419881185, G42916606, G4501827968, G498139845, WE PROPOSE TO CARRY OUT A PROGRAM OF OBSERVATIONS WITH THE COSMIC INFRARED BACKGROUND EXPERIMENT (CIBER-2), A SOUNDING ROCKET INSTRUMENT DESIGNED TO, G6652958823, THE RESEARCH PROGRAM DESCRIBED IN THIS PROPOSAL CAN BE BROADLY DESCRIBED AS DATA ANALYSIS, MEASUREMENT, AND INTERPRETATION OF THE SPATIAL FLUCTUATION, G969889393
OpenAlex ID: W2586098129