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Can topological defects mimic the BICEP2B-mode signal?
journal contribution
posted on 2023-06-09, 09:29 authored by Joanes Lizarraga, Jon Urrestilla, David Daverio, Mark HindmarshMark Hindmarsh, Martin Kunz, Andrew R LiddleWe 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.
Funding
Particle Physics Theory at Royal Holloway and Sussex; G0742; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/J000477/1
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- Published
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Physical Review LettersISSN
0031-9007Publisher
American Physical SocietyExternal DOI
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17Volume
112Department affiliated with
- Physics and Astronomy Publications
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- Yes
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- Yes
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2017-12-20First Open Access (FOA) Date
2017-12-20First Compliant Deposit (FCD) Date
2017-12-20Usage metrics
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