Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies
Abstract The standard Λ Cold Dark Matter (ΛCDM) cosmological model provides a good
description of a wide range of astrophysical and cosmological data. However, there are a …
description of a wide range of astrophysical and cosmological data. However, there are a …
Challenges for ΛCDM: An update
A number of challenges to the standard Λ CDM model have been emerging during the past
few years as the accuracy of cosmological observations improves. In this review we discuss …
few years as the accuracy of cosmological observations improves. In this review we discuss …
Hubble tension or a transition of the Cepheid SnIa calibrator parameters?
We reanalyze the Cepheid data used to infer the value of the Hubble constant H 0 by
calibrating type Ia supernovae. We do not enforce a universal value of the empirical …
calibrating type Ia supernovae. We do not enforce a universal value of the empirical …
phantom transition at as a resolution of the Hubble tension
A rapid phantom transition of the dark energy equation of state parameter w at a transition
redshift zt< 0.1 of the form w (z)=-1+ Δ w Θ (zt-z) with Δ w< 0 can lead to a higher value of the …
redshift zt< 0.1 of the form w (z)=-1+ Δ w Θ (zt-z) with Δ w< 0 can lead to a higher value of the …
Joint reconstructions of growth and expansion histories from stage-IV surveys with minimal assumptions. II. Modified gravity and massive neutrinos
Based on a formalism introduced in our previous work, we reconstruct the
phenomenological function G eff (z) describing deviations from general relativity (GR) in a …
phenomenological function G eff (z) describing deviations from general relativity (GR) in a …
Gravitational transitions via the explicitly broken symmetron screening mechanism
We generalize the symmetron screening mechanism by allowing for an explicit symmetry
breaking of the symmetron ϕ 4 potential. A coupling to matter of the form A (ϕ)= 1+ ϕ 2 M 2 …
breaking of the symmetron ϕ 4 potential. A coupling to matter of the form A (ϕ)= 1+ ϕ 2 M 2 …
Tension. Is Gravity Getting Weaker at Low z? Observational Evidence and Theoretical Implications
Dynamical observational probes of the growth of density perturbations indicate that gravity
may be getting weaker at low redshifts z. This evidence is at about 2-3 σ level and comes …
may be getting weaker at low redshifts z. This evidence is at about 2-3 σ level and comes …
The significance of measuring cosmological time dilation in the Dark Energy Survey Supernova Program
S Lee - Physics of the Dark Universe, 2024 - Elsevier
In the context of the dispersion relation c= λ ν and considering an expanding universe where
the observed wavelength today is redshifted from the emitted wavelength by λ 0= λ emit (1+ …
the observed wavelength today is redshifted from the emitted wavelength by λ 0= λ emit (1+ …
[PDF][PDF] Cosmological Implications of Scalar Tensor Theories
L Kazantzidis - 2022 - cosmology.physics.uoi.gr
► The validity of General Relativity (GR).► Homogeneity and Isotropy.► Flatness of
spacetime.► A primitive phase of cosmic inflation (a period of rapid accelerated expansion) …
spacetime.► A primitive phase of cosmic inflation (a period of rapid accelerated expansion) …
[معلومات الإصدار][C] ΛCDM and the implications of the Hubble Tension
G Alestas - 2022