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   Articles with "non gaussianities" as a keyword



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Solving peak theory in the presence of local non-gaussianities

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recommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2021/08/060

Abstract: We compute the probability density distribution of maxima for a scalar random field in the presence of local non-gaussianities. The physics outcome of this analysis is the following. If we focus on maxima whose curvature… read more here.

Keywords: local non; physics; presence local; non gaussianities ... See more keywords
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Bootstrapping multi-field inflation: non-Gaussianities from light scalars revisited

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recommendations! Published in 2022 at "Journal of Cosmology and Astroparticle Physics"

DOI: 10.1088/1475-7516/2023/05/043

Abstract: Primordial non-Gaussianities from multi-field inflation are a leading target for cosmological observations, because of the possible large correlations generated between long and short distances. These signatures are captured by the local shape of the scalar… read more here.

Keywords: field inflation; non gaussianities; multi field; seed ... See more keywords
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Effect of primordial non-Gaussianities on galaxy clusters scaling relations

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recommendations! 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
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The 21-cm bispectrum as a probe of non-Gaussianities due to X-ray heating

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recommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"

DOI: 10.1093/mnras/sty2740

Abstract: We present analysis of the normalized 21-cm bispectrum from fully-numerical simulations of intergalactic-medium heating by stellar sources and high-mass X-ray binaries (HMXBs) during the cosmic dawn. Ly-α coupling is assumed to be saturated, we therefore probe… read more here.

Keywords: bispectrum; ray heating; normalized bispectrum; non gaussianities ... See more keywords