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5 papers · 2 filters
Imprints of local lightcone projection effects on the galaxy bispectrum IV: Second-order vector and tensor contributions
Sheean Jolicoeur, Alireza Allahyari, Chris Clarkson +3
The galaxy bispectrum on scales around and above the equality scale receives contributions from relativistic effects. Some of these arise from lightcone deformation effects, which…
Generation of Circular Polarization of CMB via Polarized Compton Scattering
Ali Vahedi, Jafar Khodagholizadeh, Rohoollah Mohammadi +1
The standard scenario of cosmology predicts a measurable amount for linear polarization of the Cosmic Microwave Background radiation (CMB) via Thomson scattering, while through thi…
Eigen-reconstruction of Perturbations to the Primordial Tensor Power Spectrum
M. Farhang, A. Vafaei Sadr
We explore the potential of the B-mode anisotropies of the Cosmic Microwave Background radiation (CMB) to constrain the shape of the primordial tensor power spectrum in a model-ind…
Beyond CDM with Low and High Redshift Data: Implications for Dark Energy
Koushik Dutta, Ruchika, Anirban Roy +2
Assuming that the Universe at higher redshifts (z \sim 4 and beyond) is consistent with LCDM model as constrained by the Planck measurements, we reanalyze the low redshift cosmolog…
Constant-roll approach to non-canonical inflation
Abolhassan Mohammadi, Khaled Saaidi, Haidar Sheikhahmadi
The scenario of constant-roll inflation is studied where the inflaton is a scalar field with modified kinetic term, known as non-canonical scalar field. This modification leads to…