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Title: Current and Future Constraints on Primordial Magnetic Fields

Abstract

Here, 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 $${D}_{{\ell }=1500}^{\mathrm{BB}}\lt 0.071\,\mu {K}^{2}$$ for Planck versus $${D}_{{\ell }=1500}^{\mathrm{BB}}\lt 0.034\,\mu {K}^{2}$$ 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.

Authors:
 [1];  [2]; ORCiD logo [1]
  1. Univ. of Melbourne, Parkville, VIC (Australia). School of Physics
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1524230
Grant/Contract Number:  
[AC02-05CH11231]
Resource Type:
Accepted Manuscript
Journal Name:
The Astrophysical Journal (Online)
Additional Journal Information:
[Journal Name: The Astrophysical Journal (Online); Journal Volume: 846; Journal Issue: 2]; Journal ID: ISSN 1538-4357
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmic background radiation; early universe; magnetic fields; polarization

Citation Formats

Sutton, Dylan R., Feng, Chang, and Reichardt, Christian L. Current and Future Constraints on Primordial Magnetic Fields. United States: N. p., 2017. Web. doi:10.3847/1538-4357/aa85e2.
Sutton, Dylan R., Feng, Chang, & Reichardt, Christian L. Current and Future Constraints on Primordial Magnetic Fields. United States. doi:10.3847/1538-4357/aa85e2.
Sutton, Dylan R., Feng, Chang, and Reichardt, Christian L. Sun . "Current and Future Constraints on Primordial Magnetic Fields". United States. doi:10.3847/1538-4357/aa85e2. https://www.osti.gov/servlets/purl/1524230.
@article{osti_1524230,
title = {Current and Future Constraints on Primordial Magnetic Fields},
author = {Sutton, Dylan R. and Feng, Chang and Reichardt, Christian L.},
abstractNote = {Here, 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 ${D}_{{\ell }=1500}^{\mathrm{BB}}\lt 0.071\,\mu {K}^{2}$ for Planck versus ${D}_{{\ell }=1500}^{\mathrm{BB}}\lt 0.034\,\mu {K}^{2}$ 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.},
doi = {10.3847/1538-4357/aa85e2},
journal = {The Astrophysical Journal (Online)},
number = [2],
volume = [846],
place = {United States},
year = {2017},
month = {9}
}

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    Works referencing / citing this record:

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