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Weak Primordial Magnetic Fields and Anisotropies in the Cosmic Microwave Background Radiation

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arxiv 1108.2517 v1 pith:RET3Q6WH submitted 2011-08-11 astro-ph.CO

Weak Primordial Magnetic Fields and Anisotropies in the Cosmic Microwave Background Radiation

classification astro-ph.CO
keywords fieldsmagneticbackgroundcosmicinhomogeneitiesmicrowaveprimordialangular
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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^(-11) Gauss by upcoming cosmic microwave background observations.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Primordial magnetic field from chiral plasma instability with sourcing

    hep-ph 2025-12 conditional novelty 6.0

    Adding a chirality source allows the chiral plasma instability to generate helical magnetic fields below the 80 TeV erasure temperature, with a helicity estimate confirmed by 1024^3 simulations.

  2. The Hubble tension: A decade review

    astro-ph.CO 2026-06 conditional novelty 3.0

    Pure early or late fixes to the Hubble tension are tightly constrained; remaining options are combined early-late interacting dark energy or new physics at the local-to-homogeneous transition.

  3. The Hubble tension: A decade review

    astro-ph.CO 2026-06 unverdicted novelty 2.0

    A review summarizing the Hubble tension as a persistent crisis and discussing resolutions via interacting dark energy models that combine early-time and late-time modifications.