Local primordial non-Gaussianity in the relativistic galaxy bispectrum
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/04/013
Abstract: Next-generation galaxy and 21cm intensity mapping surveys will rely on a combination of the power spectrum and bispectrum for high-precision measurements of primordial non-Gaussianity. In turn, these measurements will allow us to distinguish between various… read more here.
Keywords: galaxy; non gaussianity; order; primordial non ... See more keywords
Primordial non-Gaussianity from G-inflation
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/04/045
Abstract: Enormous information about interactions is contained in the non-Gaussianities of the primordial curvature perturbations, which are essential to break the degeneracy of inflationary models. We study the primordial bispectra for G-inflation models predicting both sharp… read more here.
Keywords: non gaussianity; primordial non; gaussianity; power spectrum ... See more keywords
Biases to primordial non-Gaussianity measurements from CMB secondary anisotropies
Sign Up to like & getrecommendations! Published in 2022 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stad1305
Abstract: Our view of the last-scattering surface in the cosmic microwave background (CMB) is obscured by secondary anisotropies, sourced by scattering, extragalactic emission and gravitational processes between recombination and observation. Whilst it is established that non-Gaussianity… read more here.
Keywords: secondary anisotropies; non gaussianity; gaussianity measurements; primordial non ... See more keywords
Effect of primordial non-Gaussianities on galaxy clusters scaling relations
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stx763
Abstract: Galaxy clusters are a valuable source of cosmological information. Their formation and evolution depends on the underlying cosmology and on the statistical nature of the primordial density fluctuations. In this work we investigate the impact… read more here.
Keywords: non gaussianities; effect; primordial non; galaxy clusters ... See more keywords
New shapes of primordial non-Gaussianity from quasi-single field inflation with multiple isocurvatons
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.043534
Abstract: We study a simple extension of quasi-single field inflation in which the inflaton interacts with multiple extra massive scalars known as isocurvatons. Due to the breaking of time translational invariance by the inflaton background, the… read more here.
Keywords: single field; inflation; field inflation; multiple isocurvatons ... See more keywords
Double-peaked inflation model: Scalar induced gravitational waves and primordial-black-hole suppression from primordial non-Gaussianity
Sign Up to like & getrecommendations! Published in 2021 at "Physical Review D"
DOI: 10.1103/physrevd.104.063515
Abstract: A significant abundance of primordial black hole (PBH) dark matter can be produced by curvature perturbations with power spectrum ∆ζ(kpeak) ∼ O(10−2) at small scales, associated with the generation of observable scalar induced gravitational waves… read more here.
Keywords: non gaussianity; inflation; model; kpeak kpeak ... See more keywords
Imprints of primordial non-Gaussianity on gravitational wave spectrum
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.99.041301
Abstract: Although Cosmic Microwave Background and Large Scale Structure probe the largest scales of our universe with ever increasing precision, our knowledge about the smaller scales is still very limited other than the bounds on Primordial… read more here.
Keywords: non gaussianity; gravitational wave; imprints primordial; primordial non ... See more keywords