Cosmic (Super)String Constraints from 21 cm Radiation

Rishi Khatri and Benjamin D. Wandelt
Phys. Rev. Lett. 100, 091302 – Published 4 March 2008

Abstract

We calculate the contribution of cosmic strings arising from a phase transition in the early Universe, or cosmic superstrings arising from brane inflation, to the cosmic 21 cm power spectrum at redshifts z30. Future experiments can exploit this effect to constrain the cosmic string tension Gμ and probe virtually the entire brane inflation model space allowed by current observations. Although current experiments with a collecting area of 1km2 will not provide any useful constraints, future experiments with a collecting area of 104106km2 covering the cleanest 10% of the sky can, in principle, constrain cosmic strings with tension Gμ10101012 (superstring/phase transition mass scale >1013GeV).

  • Figure
  • Figure
  • Received 9 September 2007

DOI:https://doi.org/10.1103/PhysRevLett.100.091302

©2008 American Physical Society

Authors & Affiliations

Rishi Khatri*

  • Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, Illinois 61801, USA

Benjamin D. Wandelt

  • Departments of Physics and Astronomy, University of Illinois at Urbana-Champaign, 1002 W. Green Street, Urbana, Illinois 61801, USA

  • *rkhatri2@uiuc.edu
  • bwandelt@uiuc.edu

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Issue

Vol. 100, Iss. 9 — 7 March 2008

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