Parameter discordance in Planck CMB and low-redshift measurements: projection in the primordial power spectrum
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/04/036
Abstract: We discuss the discordance between the estimated values of the cosmological parameters from Planck assuming the concordance $\Lambda$CDM model and low-redshift measurements. In particular, we consider the Hubble constant mismatch between Planck temperature constraint for… read more here.
Keywords: discordance; low redshift; primordial power; cosmology ... See more keywords
Primordial Power Spectrum reconstruction from CMB Weak Lensing Power Spectrum
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2021/10/081
Abstract: We use the modified and improved Richardson-Lucy (IRL) deconvolution algorithm to reconstruct the Primordial Power Spectrum (PPS) from the Weak Lensing Power Spectrum CL ϕϕ reconstructed from CMB anisotropies. This provides an independent window to… read more here.
Keywords: primordial power; power; weak lensing; lensing power ... See more keywords
Knot reconstruction of the scalar primordial power spectrum with Planck, ACT, and SPT CMB data
Sign Up to like & getrecommendations! Published in 2025 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2025/07/077
Abstract: We investigate a non-parametric Bayesian method for reconstructing the primordial power spectrum (PPS) of scalar perturbations using temperature and polarisation data from the Planck, ACT, and SPT CMB experiments. This reconstruction method is based on… read more here.
Keywords: power spectrum; act spt; planck; primordial power ... See more keywords
Cosmological zoom-in simulations of Milky Way host size dark matter halos with a blue-tilted primordial power spectrum
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/59fw-974t
Abstract: Recent observations from the James Webb Space Telescope revealed a surprisingly large number of galaxies at high redshift, challenging the standard Lambda Cold Dark Matter cosmology with a power-law primordial power spectrum. Previous studies alleviated… read more here.
Keywords: primordial power; dark matter; blue tilted; cosmology ... See more keywords
Primordial power spectra for curved inflating universes
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.123517
Abstract: Exact numerical primordial primordial power spectra are computed and plotted for the for the best-fit Planck 2018 curved universe parameters. It is found that the spectra have generic cut-offs and oscillations within the observable window… read more here.
Keywords: power spectra; primordial power; curved inflating; spectra curved ... See more keywords
3D simulations with boosted primordial power spectra and ultracompact minihalos
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.96.123519
Abstract: We perform three-dimensional simulations of structure formation in the early Universe, when boosting the primordial power spectrum on $\ensuremath{\sim}\mathrm{kpc}$ scales. We demonstrate that our simulations are capable of producing power-law profiles close to the steep… read more here.
Keywords: primordial power; ensuremath; power; ultracompact minihalos ... See more keywords