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Fitting BICEP2 with defects, primordial gravitational waves and dust
Joanes Lizarraga, Jon Urrestilla, David Daverio +3
In this work we discuss the possibility of cosmic defects being responsible for the B-mode signal measured by the BICEP2 collaboration. We also allow for the presence of other cosm…
Tensors, BICEP2, prior dependence, and dust
Marina Cortês, Andrew R. Liddle, David Parkinson
We investigate the prior dependence on the inferred spectrum of primordial tensor perturbations, in light of recent results from BICEP2 and taking into account a possible dust cont…
Constraining topological defects with temperature and polarization anisotropies
Joanes Lizarraga, Jon Urrestilla, David Daverio +3
We analyse the possible contribution of topological defects to cosmic microwave anisotropies, both temperature and polarisation. We allow for the presence of both inflationary scal…
The observational position of simple non-minimally coupled inflationary scenarios
David C. Edwards, Andrew R. Liddle
We consider two classes of non-minimally coupled inflation models; those with a quadratic coupling of the inflaton to gravity, and the `Universal Attractor' models where the coupli…
Can topological defects mimic the BICEP2 B-mode signal?
Joanes Lizarraga, Jon Urrestilla, David Daverio +3
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…
Comprehensive analysis of the simplest curvaton model
Christian T. Byrnes, Marina Cortês, Andrew R. Liddle
We carry out a comprehensive analysis of the simplest curvaton model, which is based on two non-interacting massive fields. Our analysis encompasses cases where the inflaton and cu…