Lizarraga, Joanes, Urrestilla, Jon, Daverio, David, Hindmarsh, Mark, Kunz, Martin and Liddle, Andrew R (2014) Can topological defects mimic the BICEP2B-mode signal? Physical Review Letters, 112 (17). ISSN 0031-9007

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Abstract

We show that the B-mode polarization signal detected at low multipoles by BICEP2 cannot be entirely due to topological defects. This would be incompatible with the high-multipole B-mode polarization data and also with existing temperature anisotropy data. Adding cosmic strings to a model with tensors, we find that B modes on their own provide a comparable limit on the defects to that already coming from Planck satellite temperature data. We note that strings at this limit give a modest improvement to the best fit of the B-mode data, at a somewhat lower tensor-to-scalar ratio of r ≃ 0.15.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Subjects:	Q Science > QC Physics
Depositing User:	Billy Wichaidit
Date Deposited:	20 Dec 2017 16:37
Last Modified:	20 Dec 2017 16:37
URI:	http://srodev.sussex.ac.uk/id/eprint/72400

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