Bounds on cosmic strings from WMAP and SDSS

By Mark Wyman, Levon Pogosian, I. Wasserman. 2005

157 citations recorded by the source corpus.

We find the constraints from Wilkinson microwave anisotropy probe (WMAP) and Sloan digital sky survey (SDSS) data on the fraction of cosmological fluctuations sourced by local cosmic strings using a Markov Chain Monte Carlo (MCMC) analysis. In addition to varying the usual 6 cosmological parameters and the string tension ({mu}), we also varied the amount of small-scale structure on the strings. Our results indicate that cosmic strings can account for up to 7 (14)% of the total power of the microwave anisotropy at 68 (95)% confidence level. The corresponding bound on the string mass per unit length, within our string model, is G{mu}<3.4(5)x10{sup -7} at 68 (95)% C.L. We also calculate the B-type polarization spectra sourced by cosmic strings and discuss the prospects of their detection.

View Paper: https://www.semanticscholar.org/paper/3fbf0f7f43e06380ee857a1f400024f1d0ff4b9e

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Citations in the corpus

• COrE (Cosmic Origins Explorer) A White Paper (2011, background): “There is some uncertainty in precise details of the anisotropies and polarization predicted by cosmic strings [58, 59, 60, 61, 62, 63, 64].”
• THE ATACAMA COSMOLOGY TELESCOPE: COSMOLOGICAL PARAMETERS FROM THE 2008 POWER SPECTRUM (2010, background): “Constraints have been placed on the cosmic string tension from recent CMB and other cosmological data (Lo & Wright 2005;Wyman et al. 2005, 2006; Battye et al. 2006; Fraisse 2007; Bevis et al. 2007; Urrestilla et al. 2008; Sievers et al. 2009).”