A new diagnostic for the null test of dynamical dark energy in light of DESI 2024 and other BAO data
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2024/09/062
Abstract: We introduce a new diagnostic for the null tests of dynamical dark energy alongside two other combined equivalent diagnostics. These diagnostics are useful, especially when we include anisotropic baryon acoustic oscillation (BAO) data in an… read more here.
Keywords: dynamical dark; energy; bao data; dark energy ... See more keywords
Robust preference for Dynamical Dark Energy in DESI BAO and SN measurements
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2024/10/035
Abstract: Recent Baryon Acoustic Oscillation (BAO) measurements released by DESI, when combined with Cosmic Microwave Background (CMB) data from Planck and two different samples of Type Ia supernovae (Pantheon-Plus and DESY5) reveal a preference for Dynamical… read more here.
Keywords: dynamical dark; preference dynamical; preference; dark energy ... See more keywords
New constraints on cosmological gravitational waves from CMB and BAO in light of dynamical dark energy
Sign Up to like & getrecommendations! Published in 2025 at "Chinese Physics C"
DOI: 10.1088/1674-1137/ae167c
Abstract: In this work, we derive upper limits on the physical energy-density fraction today of cosmological gravitational waves, denoted by , by analyzing Planck, ACT, SPT CMB, and DESI BAO data combinations. In the standard cosmological… read more here.
Keywords: dynamical dark; light dynamical; energy; gravitational waves ... See more keywords
Configuration entropy in the ΛCDM and the dynamical dark energy models: Can we distinguish one from the other?
Sign Up to like & getrecommendations! Published in 2018 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/sty2873
Abstract: The evolution of the configuration entropy of the mass distribution in the Universe is known to be governed by the growth rate of density perturbations and the expansion rate of the Universe. We consider the… read more here.
Keywords: configuration entropy; dark energy; dynamical dark; configuration ... See more keywords
Dynamical dark energy from an ultralight axion
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/3mpg-24d2
Abstract: Recently the Dark Energy Survey (DES) Collaboration presented evidence that the equation of state $w$ of the dark energy is varying, or $w \simeq -0.948$ if it is constant. In either case, the dark energy… read more here.
Keywords: ultralight axion; dynamical dark; dark energy; energy ... See more keywords
Cosmological implications of tracker scalar fields: Testing the evidence for dynamical dark energy with recent data
Sign Up to like & getrecommendations! Published in 2025 at "Physical Review D"
DOI: 10.1103/cfwx-y336
Abstract: We investigate non phantom tracker scalar field models as dynamical dark energy scenario. These models can alleviate the cosmic coincidence problem and transition to a cosmological constant-like behaviour at late times. Focusing on the inverse… read more here.
Keywords: evidence dynamical; dynamical dark; energy; dark energy ... See more keywords
Interacting scenarios with dynamical dark energy: Observational constraints and alleviation of the H0 tension
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.103520
Abstract: We investigate interacting scenarios which belong to a wider class, since they include a dynamical dark energy component whose equation of state follows various one-parameter parametrizations. We confront them with the latest observational data from… read more here.
Keywords: dynamical dark; parameter; dark energy; tension ... See more keywords
Dynamical dark sectors and neutrino masses and abundances
Sign Up to like & getrecommendations! Published in 2020 at "Physical Review D"
DOI: 10.1103/physrevd.102.023535
Abstract: We investigate generalized interacting dark matter--dark energy scenarios with a time-dependent coupling parameter, allowing also for freedom in the neutrino sector. The models are tested in the phantom and quintessence regimes, characterized by equations of… read more here.
Keywords: dynamical dark; sectors neutrino; dark; ensuremath ... See more keywords
Dynamical dark energy can amplify the expansion rate of the Universe
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.103529
Abstract: By adding a matter-coupled dark energy field to Einstein's General Relativity (GR), this paper proves that the dynamical dark energy field can change the frequency of photons from distant galaxies as well as from background… read more here.
Keywords: rate universe; dynamical dark; dark energy; energy ... See more keywords
Interpreting DESI 2024 BAO: Late-time dynamical dark energy or a local effect?
Sign Up to like & getrecommendations! Published in 2024 at "Physical Review D"
DOI: 10.1103/physrevd.111.043540
Abstract: We perform fits to DESI, CMB and supernova data to understand the physical origin of the DESI hint for dynamical dark energy. We find that the linear parametrization of the equation of state $w$ may… read more here.
Keywords: dynamical dark; energy; dark energy; interpreting desi ... See more keywords
Dynamical Dark Matter from Strongly-Coupled Dark Sectors
Sign Up to like & getrecommendations! Published in 2017 at "Physical Review D"
DOI: 10.1103/physrevd.95.043526
Abstract: Dynamical Dark Matter (DDM) is an alternative framework for dark-matter physics in which the dark sector comprises a vast ensemble of particle species whose decay widths are balanced against their cosmological abundances. Previous studies of… read more here.
Keywords: coupled dark; matter; dark matter; strongly coupled ... See more keywords