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A cosmic string solution to the radio synchrotron background
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A cosmic string solution to the radio synchrotron background
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We investigate the low-frequency spectral emission from a network of superconducting cosmic string loops in hopes of explaining the observed radio synchrotron background. After considering constraints from a variety of astrophysical and cosmological measurements, we identify a best-fit solution with string tension $G\mu \simeq 6.5 \times 10^{-12}$ and current $\mathcal{I} \simeq 2.5 \times 10^6$ GeV. This model yields a convincing fit to the data and may be testable in the near future by spectral distortion (TMS, BISOU) and 21 cm experiments (HERA, SKA, REACH). We also find that soft photon heating protects us against current constraints from global $21$ cm experiments.
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Cited by 1 Pith paper
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Gravitational Waves from Superconducting Cosmic Strings
Lattice simulations show the gravitational-wave spectrum from superconducting cosmic strings develops a coupling-dependent suppression at high frequencies, distinguishing them from ordinary Abelian–Higgs strings.
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