Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/12/046
Abstract: Baryonic feedback effects consist of a major systematic for upcoming weak-lensing and galaxy-clustering surveys. In this paper, we present an emulator for the baryonic suppression of the matter power spectrum. The emulator is based on… read more here.
Keywords: matter power; power spectrum; emulator; power ... See more keywords
Reconstructing the matter power spectrum with future cosmic shear surveys
Sign Up to like & getrecommendations! Published in 2024 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stae1848
Abstract: Analyses of cosmic shear typically condense weak lensing information over a range of scales to a single cosmological parameter, S8. This paper presents a method to extract more information from Stage-IV cosmic shear measurements by… read more here.
Keywords: cosmic shear; matter power; power; power spectrum ... See more keywords
Perturbative approach to covariance matrix of the matter power spectrum
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stw3196
Abstract: Author(s): Mohammed, I; Seljak, U; Vlah, Z | Abstract: © 2016 The Authors. We evaluate the covariance matrix of the matter power spectrum using perturbation theory up to dominant terms at 1-loop order and compare… read more here.
Keywords: matter power; covariance; covariance matrix; power spectrum ... See more keywords
Probing the small-scale matter power spectrum with large-scale 21-cm data
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.063526
Abstract: The distribution of matter fluctuations in our universe is key for understanding the nature of dark matter and the physics of the early cosmos. Different observables have been able to map this distribution at large… read more here.
Keywords: power spectrum; scale; matter power; matter ... See more keywords
Effective halo model: Creating a physical and accurate model of the matter power spectrum and cluster counts
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.101.123520
Abstract: We introduce a physically-motivated model of the matter power spectrum, based on the halo model and perturbation theory. This model achieves 1\% accuracy on all $k-$scales between $k=0.02h\,\mathrm{Mpc}^{-1}$ to $k=1h\,\mathrm{Mpc}^{-1}$. Our key ansatz is that… read more here.
Keywords: model; matter power; power spectrum;
Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.103501
Abstract: The matter power spectrum has been strongly constrained by astronomical measurements at large scales, but only weakly at small scales. Compared with the standard scenario, the deviation of the matter power spectrum at small scales… read more here.
Keywords: matter; matter power; power spectrum; small scales ... See more keywords
Gravitational turbulence: The small-scale limit of the cold-dark-matter power spectrum
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/ychs-2d5p
Abstract: The matter power spectrum, P(k), is one of the fundamental quantities in the study of large-scale structure in cosmology. Here, we study its small-scale asymptotic limit, and show that for cold dark matter in d… read more here.
Keywords: dark matter; small scale; power spectrum; matter ... See more keywords