Early reionization by cosmic strings revisited

Details Early reionization by cosmic strings revisited Early reionization by cosmic strings revisited

2004-05-30

arxiv.org/abs/astro-ph/0405606v2

Phys.Rev. D70 (2004) 063523

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1103/PhysRevD.70.063523

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.

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