Results 31 to 40 of about 13,060 (254)
Baryon acoustic oscillations and dynamical dark energy [PDF]
Journal of Cosmology and Astroparticle Physics, 2007 4 pages, added sections and references, matches published ...
Doran, Michael +2 more
openaire +2 more sources
Interacting Dark Energy after DESI Baryon Acoustic Oscillation measurements [PDF]
Physical Review LettersWe investigate the implications of the baryon acoustic oscillations measurement released by the Dark Energy Spectroscopic Instrument for interacting dark energy (IDE) models characterized by an energy-momentum flow from dark matter to dark energy.
William Giarè +3 more
openalex +5 more sources
Small Scale Cosmological Perturbations: An Analytic Approach [PDF]
, 1995 Through analytic techniques verified by numerical calculations, we establish general relations between the matter and cosmic microwave background (CMB) power spectra and their dependence on cosmological parameters on small scales. Fluctuations in the CMB,
Hu, Wayne, Sugiyama, Naoshi
core +2 more sources
Baryon acoustic oscillations in the Lyman alpha forest [PDF]
Journal of Physics: Conference Series, 2009 We use hydrodynamic cosmological simulations in a (600 Mpc)^3 volume to study the observability of baryon acoustic oscillations (BAO) in the intergalactic medium as probed by Lyman alpha forest (LAF) absorption. The large scale separation between the wavelength of the BAO mode (~150 Mpc) and the size of LAF absorbers (~100 kpc) makes this a numerically
Michael L. Norman +2 more
openalex +3 more sources
BARYONIC ACOUSTIC OSCILLATIONS VIA THE RENORMALIZATION GROUP [PDF]
Modern Physics Letters A, 2008 Renormalization Group techniques, successfully employed in quantum field theory and statistical physics, are applied to study the dynamics of structure formation in the Universe. A semi-analytic approach to the computation of the nonlinear power-spectrum of dark matter density fluctuations is proposed.
MATARRESE, SABINO, PIETRONI M.
openaire +4 more sources
The Impact of Wrong Assumptions in BAO Reconstruction [PDF]
, 2019 The process of density field reconstruction enhances the statistical power of distance scale measurements using baryon acoustic oscillations (BAO). During this process a fiducial cosmology is assumed in order to convert sky coordinates and redshifts into
Sherwin, Blake D., White, Martin
core +2 more sources
The Damping Tail of CMB Anisotropies [PDF]
, 1996 By decomposing the damping tail of CMB anisotropies into a series of transfer functions representing individual physical effects, we provide ingredients that will aid in the reconstruction of the cosmological model from small-scale CMB anisotropy data ...
Aghanim N. +10 more
core +3 more sources
Baryonic Signatures in Large-Scale Structure [PDF]
, 1998 We investigate the consequences of a non-negligible baryon fraction for models of structure formation in Cold Dark Matter dominated cosmologies, emphasizing in particular the existence of oscillations in the present-day matter power spectrum.
A. Meiksin, Cao, J. A. Peacock, M. White
core +2 more sources
The Physics of Microwave Background Anisotropies [PDF]
, 1995 Cosmic microwave background anisotropies provide a vast amount of information on both structure formation in the universe and the background dynamics and geometry.
Hu, Wayne +2 more
core +3 more sources
Bianchi Type‐I Bulk Viscosity with a DE Cosmological Model
Advances in High Energy Physics, Volume 2020, Issue 1, 2020., 2020 The finding article presents Bianchi type‐I universe in the presence of bulk viscous and DE fluid nature of a cosmological model. The solutions of field equations were obtained by assuming hybrid expansion law. The physical significance of the obtained findings illustrates the dominance of bulk viscosity in early and dominance of dark energy fluid ...
Daba Meshesha Gusu, Saibal Ray
wiley +1 more source