The $$H_0$$ Tensions to Discriminate Among Concurring Models

Valentino, Eleonora Di

doi:10.1007/978-3-030-83715-0_32

Modified Gravity and Cosmology 2021

DOI: 10.1007/978-3-030-83715-0_32

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The $$H_0$$ Tensions to Discriminate Among Concurring Models

Eleonora Di Valentino

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2022

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Cited by 2 publications

References 132 publications

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Reconstruction of the dark sectors’ interaction: A model-independent inference and forecast from GW standard sirens

Bonilla

Kumar

Nunes

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Interacting dark matter (DM) - dark energy (DE) models have been intensively investigated in the literature for their ability to fit various data sets as well as to explain some observational tensions persisting within the ΛCDM cosmology. In this work, we employ the Gaussian processes (GP) algorithm to perform a joint analysis by using the geometrical cosmological probes such as Cosmic chronometers, Supernova Type Ia, Baryon Acoustic Oscillations, and the H0LiCOW lenses sample to infer a reconstruction of the coupling function between the dark components in a general framework, where the DE can assume a dynamical character via its equation of state. In addition to the joint analysis with these data, we simulate a catalog with standard siren events from binary neutron star mergers, within the sensitivity predicted by the Einstein Telescope, to reconstruct the dark sector coupling with more accuracy in a robust way. We find that the particular case, where w = −1 is fixed on the DE nature, has a statistical preference for an interaction in the dark sector at late times. In the general case, where w(z) is analyzed, we find no evidence for such dark coupling, and the predictions are compatible with the ΛCDM paradigm. When the mock events of the standard sirens are considered to improve the kernel in GP predictions, we find a preference for an interaction in the dark sector at late times.

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Reconstruction of the dark sectors’ interaction: A model-independent inference and forecast from GW standard sirens

Bonilla

Kumar

Nunes

et al. 2022

Monthly Notices of the Royal Astronomical Society

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Challenges of the Standard Cosmological Model

Valentino

2022

Universe

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Measurements of the temperature and polarization anisotropy of the cosmic microwave background (CMB) provided strong confirmation of the vanilla flat ΛCDM model of structure formation. Even if this model fits incredibly well, the cosmological and astrophysical observations in a wide range of scales and epochs, some interesting tensions between the cosmological probes, and anomalies in the CMB data, have emerged. These discrepancies have different statistical significance, and although some parts may be due to systematic errors, their persistence strongly indicates possible cracks in the standard ΛCDM cosmological scenario.

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The $$H_0$$ Tensions to Discriminate Among Concurring Models

Cited by 2 publications

References 132 publications

Reconstruction of the dark sectors’ interaction: A model-independent inference and forecast from GW standard sirens

Reconstruction of the dark sectors’ interaction: A model-independent inference and forecast from GW standard sirens

Challenges of the Standard Cosmological Model

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