Early reionization by cosmic strings revisited

Abstract

Measurements of the CMB temperature anisotropy and the temperature-polarization cross correlation by WMAP suggest a reionization redshift of $z\sim 17\pm 5$. On the other hand, observations of high redshift galaxies indicate a presence of a significant fraction of neutral hydrogen at redshift $z\sim 6-7$. We show that cosmic strings with tensions well within, but not far from, current observation bounds could cause early star formation at a level sufficient to explain the high reionization redshift.

5 pages, a new paragraph added, matches the version accepted to PRD

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Cited by in corpus (17)

• Bounds on Cosmic Strings from WMAP and SDSS
• D3/D7 Brane Inflation and Semilocal Strings
• Seeking String Theory in the Cosmos
• Early Structure Formation from Cosmic String Loops in Light of Early JWST Observations
• Reionization from cosmic string loops
• Cosmic Strings as Emitters of Extremely High Energy Neutrinos
• Cosmic String in the BTZ Black Hole Background with Time-Dependant Tension
• Magnetogenesis from Cosmic String Loops
• Cosmological evolution of cosmic strings with time-dependent tension
• Correlations between 21 cm Radiation and the CMB from Active Sources
• Implications of cosmic strings with time-varying tension on CMB and large scale structure
• The evolution of circular loops of a cosmic string with periodic tension
• Thermodynamics of Cosmic Defect Network Evolution
• The circular loop equation of a cosmic string with time-varying tension
• High redshift signatures in the 21 cm forest due to cosmic string wakes
• The circular loop equation of a cosmic string with time-varying tension in de Sitter spacetimes
• 21 cm Angular Spectrum of Cosmic String Loops