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Constraints on Superconducting Cosmic Strings from the Global $21$-cm Signal before Reionization

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arxiv 1902.08282 v1 pith:GC3NL4WW submitted 2019-02-21 astro-ph.CO gr-qchep-phhep-th

Robert Brandenberger , Bryce Cyr , Rui Shi This is my paper · ORCID
classification astro-ph.COgr-qchep-phhep-th
keywords stringssuperconductingabsorptionbeforeconstraintscosmicfeatureglobal
verification ladder T0 review T1 audit T2 compute T3 formal

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Electromagnetic radiation from the cusp region of superconducting cosmic strings leads to a radio excess in the photon spectrum in the early universe and can produce a deep absorption feature in the global 21cm signal before the epoch of reionization. We study the constraints on the parameter space of superconducting strings which can be derived by demanding that the absorption feature is not larger in amplitude than what has recently been reported by the EDGES collaboration.

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Cited by 4 Pith papers

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

  1. Impact of numerical stability in Bayesian noise wave calibration on global 21-cm experiments

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    Near-collinearity of noise-source and load design-matrix columns makes REACH’s five-parameter Bayesian calibration non-reproducible; a four-parameter Chebyshev fit with hot-load T_NS(ν) recovery and spike masking stab...

  2. Stochastic Gravitational Wave Background from Chiral Superconducting Cosmic Strings

    astro-ph.CO 2024-12 conditional novelty 6.0 of 10

    Superconducting cosmic string loops emit vector radiation whose strength is fitted in this paper; including this channel suppresses the predicted gravitational wave background for strong coupling and can make the spec...

  3. Excess Radiation from Axion-Photon Conversion

    astro-ph.CO 2024-11 conditional novelty 6.0 of 10

    Resonant conversion of axion-like particles into photons in stochastic magnetic fields can produce an f^-2 radio excess matching ARCADE-2 and deepen the 21cm absorption trough seen by EDGES.

  4. Axion-Photon Conversion in FLRW with Primordial Magnetic Fields: Explaining the Radio Excess

    astro-ph.CO 2025-09 conditional novelty 4.0 of 10

    Resonant conversion of axion-like particles into photons in nanogauss primordial magnetic fields is claimed to explain both the ARCADE2 radio excess and the EDGES 21-cm trough for axion masses near 10^-14 to 10^-12 eV.

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