H0 tension, phantom dark energy, and cosmological parameter degeneracies

 tension, phantom dark energy, and cosmological parameter degeneracies},
  author={George Alestas and Lavrentios Kazantzidis and Leandros Perivolaropoulos},
  journal={Physical Review D},
Phantom dark energy (w<-1) can produce amplified cosmic acceleration at late times, thus increasing the value of H0 favored by CMB data and releasing the tension with local measurements of H0. We show that the best fit value of H0 in the context of the CMB power spectrum is degenerate with a constant equation-of-state parameter w, in accordance with the approximate effective linear equation H0+30.93w-36.47=0 (H0 in km sec-1 Mpc-1). This equation is derived by assuming that both Ω0mh2 and dA… 

Figures and Tables from this paper

The Hubble Tension, the M Crisis of Late Time H(z) Deformation Models and the Reconstruction of Quintessence Lagrangians
We present a detailed and pedagogical analysis of recent cosmological data, including CMB, BAO, SnIa and the recent local measurement of H0. We thus obtain constraints on the parameters of these
Cosmological Boundary Flux Parameter
Rafael Hernández-Jiménez, ∗ Claudia Moreno, † Mauricio Bellini, ‡ and C. Ortiz § Departamento de F́ısica, Centro Universitario de Ciencias Exactas e Ingenieŕıas, Universidad de Guadalajara Av.
Early Dark Energy from a Higher-dimensional Gauge Theory
The Hubble constant estimated from the CMB measurements shows large disagreement with the locally measured value. This inconsistency is called the Hubble tension and is vastly studied in recent
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 leads to an
Is local H 0 at odds with dark energy EFT?
Local H_0 determinations currently fall in a window between H 0 ∼ 70 km/s/Mpc (TRGB) and H 0 ∼ 76 km/s/Mpc (Tully-Fisher). In contrast, BAO data calibrated in an early ΛCDM universe are largely
On the Evolution of the Hubble Constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: A Feasibility Study for GRB-Cosmology in 2030
The difference from 4 to 6 σ in the Hubble constant (H0) between the values observed with the local (Cepheids and Supernovae Ia, SNe Ia) and the high-z probes (Cosmic Microwave Background obtained by
Is the Hubble Crisis Connected with the Extinction of Dinosaurs?
It has recently been suggested that a gravitational transition of the effective Newton’s constant Geff by about 10%, 50–150 Myrs ago could lead to the resolution of both the Hubble crisis and the
Constraining the cosmological parameters using gravitational wave observations of massive black hole binaries and statistical redshift information
Space-borne gravitational wave detectors like TianQin are expected to detect gravitational wave signals emitted by the mergers of massive black hole binaries. Luminosity distance information can be


Kinetically driven quintessence
Abstract Recently, a novel class of models for inflation has been found in which theinflationary dynamics is driven solely by (non-canonical) kinetic terms ratherthan by potential terms. As an obvious
Planck 2018 results. VI. Cosmological parameters
  • (2018), arXiv:1807.06209 [astro-ph.CO].
  • 2018
New physics in light of the H0 tension: An alternative view
The strong discrepancy between local and early-time (inverse distance ladder) estimates of the Hubble constant H0 could be pointing towards new physics beyond the concordance ΛCDM model. Several
The Complete Light-curve Sample of Spectroscopically Confirmed SNe Ia from Pan-STARRS1 and Cosmological Constraints from the Combined Pantheon Sample
We present optical light curves, redshifts, and classifications for spectroscopically confirmed Type Ia supernovae (SNe Ia) discovered by the Pan-STARRS1 (PS1) Medium Deep Survey. We detail
The clustering of the SDSS DR7 Main Galaxy Sample I: a 4 per cent distance measure at z=0.15
We create a sample of spectroscopically identified galaxies with z < 0.2 from the Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7), covering 6813 deg(2). Galaxies are chosen to sample the highest
Planck 2015 Constraints on the Non-flat ΛCDM Inflation Model
We study Planck 2015 cosmic microwave background (CMB) anisotropy data using the energy density inhomogeneity power spectrum generated by quantum fluctuations during an early epoch of inflation in
On using the CMB shift parameter in tests of models of dark energy
Context. The so-called shift parameter is related to the position of t he first acoustic peak in the power spectrum of the temperatur e anisotropies of the cosmic microwave background (CMB) anis
Unified framework for early dark energy from α -attractors
One of the most appealing approaches to ease the Hubble tension is the inclusion of an early dark energy (EDE) component that adds energy to the Universe in a narrow redshift window around the time
A Bayesian comparison between $$\Lambda $$CDM and phenomenologically emergent dark energy models
In this work we examine the recently proposed phenomenological emergent dark energy (PEDE) model by \cite{Li:2019yem}, using the latest observational data in both expansion and perturbation levels.