Results 21 to 30 of about 546,296 (162)
Quantum origin of dark energy and the Hubble tension
Physics Letters B, 2022 Local measurements of the Hubble parameter obtained from the distance ladder at low redshift are in tension with global values inferred from cosmological standard rulers. A key role in the tension is played by the assumptions on the cosmological history,
Enis Belgacem, Tomislav Prokopec
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Is non-particle dark matter equation of state parameter evolving with time?
European Physical Journal C: Particles and Fields, 2021 Recently, the so-called Hubble Tension, i.e. the mismatch between the local and the cosmological measurements of the Hubble parameter, has been resolved when non-particle dark matter is considered which has a negative equation of state parameter ...
Souvik Ghose, Arunava Bhadra
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Low-Redshift Observational Constraints on Dark Energy Cosmologies [PDF]
Iranian Journal of Astronomy and Astrophysics, 2023 Applying the Markov chain Monte Carlo algorithm and using low-redshift observational data, we put cosmological constraints on dark energy cosmologies. Our main aim is to show the influence of each data sample on the procedure of constraining.
Mohammad Malekjani
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Fab-Four Cosmography to Tackle the Hubble Tension
Universe, 2023 In the context of the Fab-Four theory of gravity in a Friedmann-Lemaître-Robertson-Walker background, in this work we use the cosmography approach to study a particular self-tuning filter solution focused on a zero-curvature fixed point to study the H0 ...
Celia Escamilla-Rivera +2 more
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Axion-dilaton destabilization and the Hubble tension
Physics Letters B, 2019 The discrepancy in measurements of the Hubble constant indicates new physics in dark energy, dark matter, or both. Drawing inspiration from string theory, where axions interact with the other moduli fields, including the dilaton, here we demonstrate that
Stephon Alexander, Evan McDonough
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A review of the Hubble tension [PDF]
, 2023 The Hubble constant H0 is the rate of expansion of the universe today. The discrepancy between the early universe H0 value, inferred using ΛCDM from Planck observations of the CMB, and the late universe H0 value, obtained using luminosity and distance ...
Houliston, Rebecca
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The impact of dust on Cepheid and Type Ia supernova distances [PDF]
, 2023 Milky-Way and intergalactic dust extinction and reddening must be accounted for in measurements of distances throughout the universe. This work provides a comprehensive review of the various impacts of cosmic dust focusing specifically on its effects on ...
Brout, Dillon, Riess, Adam
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The role of CMB spectral distortions in the Hubble tension: A proof of principle
Physics Letters B, 2020 Although both early and late-time modifications of the ΛCDM model have been proposed to address the Hubble tension, compelling arguments suggest that for a solution to be successful it needs to modify the expansion history of the universe prior to ...
Matteo Lucca
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Addressing H0 tension by means of VCDM
Physics Letters B, 2021 In this letter we propose a reduction of the H0 tension puzzle by means of a theory of minimally modified gravity which is dubbed VCDM. After confronting the theory with the data, a transition in the expansion history of the universe in the low-redshift ...
Antonio De Felice +2 more
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Evidence for dynamical dark energy with an evolving Hubble constant
Astronomy & AstrophysicsContext. Hubble constant tension, together with the recent indications of dynamical dark energy proposed from the Dark Energy Spectroscopic Instrument (DESI) baryon acoustic oscillation (BAO) measurements, poses significant challenges for the standard ...
Wang Yi-Ying, Li Yin-Jie, Fan Yi-Zhong
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