35 citations · 158 across the 7 of their papers we have counts for
7 papers
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…
CMB Hemispherical Asymmetry: Long Mode Modulation and non-Gaussianity
Mohammad Hossein Namjoo, Ali Akbar Abolhasani, Shant Baghram +1
The observed hemispherical asymmetry in CMB map can be explained by modulation from a long wavelength super horizon mode which non-linearly couples to the CMB modes. We address the…
Scalar-Tensor Anti-Cross-Correlation does not Help to Reconcile the Tension between BICEP2 and Planck
Razieh Emami, Hassan Firouzjahi, Yi Wang
We examine the recent proposal [1] that the anti-cross-correlation of the scalar and tensor primordial fluctuations reconciles the tension between BICEP2 and Planck observations. W…
Jump in fluid properties of inflationary universe to reconcile scalar and tensor spectra
Hassan Firouzjahi, Mohammad Hossein Namjoo
The recent detection of the primordial gravitational waves from the BICEP2 observation seems to be in tension with the upper bound on the amplitude of tensor perturbations from the…
The TT, TB, EB and BB correlations in anisotropic inflation
Xingang Chen, Razieh Emami, Hassan Firouzjahi +1
The ongoing and future experiments will measure the B-mode from different sky coverage and frequency bands, with the potential to reveal non-trivial features in polarization map. I…