Results 31 to 40 of about 12,766 (215)
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
Physical constraints on interacting dark energy models
European Physical Journal C: Particles and Fields, 2018 Physical limits on the equation-of-state (EoS) parameter of a dark energy component non-minimally coupled with the dark matter field are examined in light of the second law of thermodynamics and the positiveness of entropy.
J. E. Gonzalez +3 more
doaj +1 more source
Can Baryonic Features Produce the Observed 100 Mpc Clustering? [PDF]
, 1997 We assess the possibility that baryonic acoustic oscillations in adiabatic models may explain the observations of excess power in large-scale structure on 100h^-1 Mpc scales. The observed location restricts models to two extreme areas of parameter space.
Alexander S. Szalay +8 more
core +2 more sources
Cosmology with photometric redshift surveys [PDF]
, 2004 We explore the utility of future photometric redshift imaging surveys for delineating the large-scale structure of the Universe, and assess the resulting constraints on the cosmological model.
Blake, Chris, Bridle, Sarah
core +4 more sources
The Astrophysical Journal, 2023 The dispersion measure (DM)–redshift relation of fast radio bursts (FRBs) has been proposed as a potential new tool for probing the intergalactic medium (IGM) and for studying cosmology. However, poor knowledge of the baryon fraction in the IGM ( f _IGM )
Bao Wang, Jun-Jie Wei
doaj +1 more source
Low-redshift constraints on covariant canonical Gauge theory of gravity
European Physical Journal C: Particles and Fields, 2021 Constraints on the Covariant Canonical Gauge Gravity (CCGG) theory from low-redshift cosmology are studied. The formulation extends Einstein’s theory of General Relativity (GR) by a quadratic Riemann–Cartan term in the Lagrangian, controlled by a ...
David Benisty +3 more
doaj +1 more source
Angular Baryon Acoustic Oscillation measure at z=2.225 from the SDSS quasar survey
, 2018 Following a quasi model-independent approach we measure the transversal BAO mode at high redshift using the two-point angular correlation function (2PACF).
Bernui, A. +4 more
core +1 more source
Constraints on the Dark Side of the Universe and Observational Hubble Parameter Data [PDF]
, 2010 This paper is a review on the observational Hubble parameter data that have gained increasing attention in recent years for their illuminating power on the dark side of the universe --- the dark matter, dark energy, and the dark age. Currently, there are
Lan, Tian, Ma, Cong, Zhang, Tong-Jie
core +3 more sources
A hybrid model of viscous and Chaplygin gas to tackle the Universe acceleration
European Physical Journal C: Particles and Fields, 2021 Motivated by two seminal models proposed to explain the Universe acceleration, this paper is devoted to study a hybrid model which is constructed through a generalized Chaplygin gas with the addition of a bulk viscosity.
A. Hernández-Almada +3 more
doaj +1 more source
Detecting the Baryons in Matter Power Spectra
, 2002 We examine power spectra from the Abell/ACO rich cluster survey and the 2dF Galaxy Redshift Survey (2dfGRS) for observational evidence of features produced by the baryons. A non-negligible baryon fraction produces relatively sharp oscillatory features at
Benjamini Y. +3 more
core +1 more source