Zobrazeno 1 - 10
of 19 520
pro vyhledávání: '"CHRONOMETERS"'
Autor:
Bergamini, P., Schuldt, S., Acebron, A., Grillo, C., Mestric, U., Granata, G., Caminha, G. B., Meneghetti, M., Mercurio, A., Rosati, P., Suyu, S. H., Vanzella, E.
We present a novel approach to measuring the expansion rate and the geometry of the Universe, which combine time-delay cosmography in lens galaxy clusters with pure samples of 'cosmic chronometers' (CCs) by probing the member galaxies. The former mak
Externí odkaz:
http://arxiv.org/abs/2401.04767
Publikováno v:
Eur. Phys. J. Plus 138, 852 (2023)
We conduct a Bayesian analysis of recent observational datasets, specifically the Cosmic Chronometers (CC) dataset and Pantheon samples, to investigate the evolution of the EoS parameter in dark energy models. Our study focused on the effective EoS p
Externí odkaz:
http://arxiv.org/abs/2309.09229
Autor:
Moresco, Michele
Twenty years after the discovery that the expansion of the Universe is accelerating, a new finding is now challenging our understanding of the cosmos. Recent studies have shown that the Hubble constant, the speed of expansion measured today, provides
Externí odkaz:
http://arxiv.org/abs/2307.09501
Autor:
Tomasetti, E., Moresco, M., Borghi, N., Jiao, K., Cimatti, A., Pozzetti, L., Carnall, A. C., McLure, R. J., Pentericci, L.
Publikováno v:
A&A 679, A96 (2023)
We derive a new constraint on the expansion history of the Universe by applying the cosmic chronometers method, studying the age evolution of high-redshift galaxies with a full-spectral-fitting approach. We select a sample of 39 massive ($log(M/M_\od
Externí odkaz:
http://arxiv.org/abs/2305.16387
We present a proof-of-principle determination of the Hubble parameter $H(z)$ from photometric data, obtaining a determination at an effective redshift of $z=0.75$ ($0.65
Externí odkaz:
http://arxiv.org/abs/2306.11425
We use the state-of-the-art data on cosmic chronometers (CCH) and the Pantheon+ compilation of supernovae of Type Ia (SNIa) to test the constancy of the SNIa absolute magnitude, $M$, and the robustness of the cosmological principle (CP) at $z\lesssim
Externí odkaz:
http://arxiv.org/abs/2301.09591
Autor:
Lee, Seokcheon
Publikováno v:
MNRAS 522, 3248-3255 (2023)
At least one dimensionless physical constant (i.e., a physically observable) must change for the cosmic time to make the varying speed of light (VSL) models phenomenologically feasible. Various physical constants and quantities also should be functio
Externí odkaz:
http://arxiv.org/abs/2301.06947
Autor:
Benndorf, D.1 (AUTHOR), Jesus, J. F.1,2 (AUTHOR), Pereira, S. H.1 (AUTHOR) s.pereira@unesp.br
Publikováno v:
European Physical Journal C -- Particles & Fields. May2022, Vol. 82 Issue 5, p1-14. 14p.
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