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Polyspectra searches for sharp oscillatory features in cosmic microwave sky data
J. R. Fergusson, H. F. Gruetjen, E. P. S. Shellard +1
We undertake a thorough search for signatures of sharp oscillatory features in the WMAP9 power spectrum and bispectrum as well as in the Planck power spectrum. For the first time,…
Combining power spectrum and bispectrum measurements to detect oscillatory features
J. R. Fergusson, H. F. Gruetjen, E. P. S. Shellard +1
The simplest inflationary models present us with few observable parameters to discriminate between them. A detection of features in the spectra of primordial density perturbations…
CMB power spectrum of Nambu-Goto cosmic strings
Andrei Lazanu, E. P. S. Shellard, Martin Landriau
We improve predictions of the cosmic microwave background (CMB) power spectrum induced by cosmic strings by using source terms obtained from Nambu-Goto network simulations in an ex…