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- W4315706521 abstract "This conference proceedings paper provides a short summary of the constraints presented by Menci et al. (2020) and Menci et al. (2022) to dynamical dark energy models. Dynamical dark energy (DDE) models have been proposed to address several observational tensions arising within the standard $Lambda$ cold dark matter ($Lambda$CDM) scenario. Different DDE models, parameterized by different combinations of the local value of the equation-of-state parameter $w_0$ and its time derivative $w_a$, predict different maximal abundance of massive galaxies in the early Universe. We use the observed abundance of massive galaxies already in place at z>=4.5 to constrain DDE models. To this aim, we consider four independent probes: (i) the observed stellar mass function at z~6 from the CANDELS survey; (ii) the estimated volume density of massive haloes derived from the observation of massive, star-forming galaxies detected in the submillimeter range at z~5; (iii) the rareness of the most massive system detected at z~7 by the SPT survey; (iv) the abundance of massive (M>10^10.5 Msun) galaxies at z~10 as inferred from early JWST observations. Our probes exclude a major fraction of the DDE parameter space that is allowed by other existing probes. In particular, early JWST results, if confirmed, are in tension with the standard $Lambda$CDM scenario at a 2$sigma$ confidence level." @default.
- W4315706521 created "2023-01-12" @default.
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- W4315706521 date "2023-01-10" @default.
- W4315706521 modified "2023-10-16" @default.
- W4315706521 title "Constraints on dark energy from the abundance of massive galaxies" @default.
- W4315706521 doi "https://doi.org/10.48550/arxiv.2301.03892" @default.
- W4315706521 hasPublicationYear "2023" @default.
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