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Expected dipole asymmetry in CMB polarization
M. H. Namjoo, A. A. Abolhasani, H. Assadullahi +3
We explore the hemispherical asymmetry predicted in cosmic microwave background polarization when there is an asymmetry in temperature anisotropies due to primordial perturbations.…
CMB hemispherical asymmetry from non-linear isocurvature perturbations
Hooshyar Assadullahi, Hassan Firouzjahi, Mohammad Hossein Namjoo +1
We investigate whether non-adiabatic perturbations from inflation could produce an asymmetric distribution of temperature anisotropies on large angular scales in the cosmic microwa…
Generalised tensor fluctuations and inflation
Dario Cannone, Gianmassimo Tasinato, David Wands
Using an effective field theory approach to inflation, we examine novel properties of the spectrum of inflationary tensor fluctuations, that arise when breaking some of the symmetr…
Impact of polarisation on the intrinsic CMB bispectrum
Guido W. Pettinari, Christian Fidler, Robert Crittenden +3
We compute the bispectrum induced in the cosmic microwave background (CMB) temperature and polarisation by the evolution of the primordial density perturbations using the second-or…
Indications of a late-time interaction in the dark sector
Valentina Salvatelli, Najla Said, Marco Bruni +2
We show that a general late-time interaction between cold dark matter and vacuum energy is favoured by current cosmological datasets. We characterize the strength of the coupling b…
Einstein's signature in cosmological large-scale structure
Marco Bruni, Juan Carlos Hidalgo, David Wands
We show how the non-linearity of general relativity generates a characteristic non-Gaussian signal in cosmological large-scale structure that we calculate at all perturbative order…