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Title: Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation

Abstract

It is shown that small-scale magnetic fields present before recombination induce baryonic density inhomogeneities of appreciable magnitude. The presence of such inhomogeneities changes the ionization history of the Universe, which in turn decreases the angular scale of the Doppler peaks and increases Silk damping by photon diffusion. This unique signature could be used to (dis)prove the existence of primordial magnetic fields of strength as small as B ≅ 10{sup −11} Gauss by cosmic microwave background observations.

Authors:
 [1];  [2]
  1. Laboratoire de Univers et Particules, UMR5299-CNRS, Université de Montpellier II, F-34095 Montpellier (France)
  2. Kavli Institute for Particle Astrophysics and Cosmology, SLAC/Stanford University, 2575 Sand Hill Road, Menlo Park, CA 94025 (United States)
Publication Date:
OSTI Identifier:
22282606
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2013; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ANISOTROPY; BARYONS; DENSITY; DIFFUSION; MAGNETIC FIELDS; PHOTONS; RECOMBINATION; RELICT RADIATION; UNIVERSE

Citation Formats

Jedamzik, Karsten, and Abel, Tom. Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation. United States: N. p., 2013. Web. doi:10.1088/1475-7516/2013/10/050.
Jedamzik, Karsten, & Abel, Tom. Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation. United States. https://doi.org/10.1088/1475-7516/2013/10/050
Jedamzik, Karsten, and Abel, Tom. 2013. "Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation". United States. https://doi.org/10.1088/1475-7516/2013/10/050.
@article{osti_22282606,
title = {Small-scale primordial magnetic fields and anisotropies in the cosmic microwave background radiation},
author = {Jedamzik, Karsten and Abel, Tom},
abstractNote = {It is shown that small-scale magnetic fields present before recombination induce baryonic density inhomogeneities of appreciable magnitude. The presence of such inhomogeneities changes the ionization history of the Universe, which in turn decreases the angular scale of the Doppler peaks and increases Silk damping by photon diffusion. This unique signature could be used to (dis)prove the existence of primordial magnetic fields of strength as small as B ≅ 10{sup −11} Gauss by cosmic microwave background observations.},
doi = {10.1088/1475-7516/2013/10/050},
url = {https://www.osti.gov/biblio/22282606}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2013,
place = {United States},
year = {Tue Oct 01 00:00:00 EDT 2013},
month = {Tue Oct 01 00:00:00 EDT 2013}
}