Theory of Gravitation and Variation in Cosmology / Théorie de la gravitation et variations en cosmologie

Collection Theory of Gravitation and Variation in Cosmology / Théorie de la gravitation et variations en cosmologie

Organizer(s) Brax, Philippe ; de la Torre, Sylvain ; Masson, Thierry ; Triay, Roland

Date(s) 12/04/2021 - 16/04/2021

linked URL https://conferences.cirm-math.fr/2651.html

00:00:00 / 00:00:00

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Model-independent cosmology

By Luca Amendola

Current estimations of cosmological parameters depend often on assumptions about the cosmological model itself. The estimates of $H_{0}$ or $\Omega_{m}$ from CMB surveys, for instance, are valid only assuming a particular model, typically the standard $\Lambda$CDM. Similar model-dependent results are obtained also from analyses of large-scale structure. In some case it is however possible to combine observations in such a way to get estimates of physical quantities that are valid regardless (to some extent) of the underlying model. Here I will discuss how one can determine the cosmological expansion rate $H(z)$ and the deviation from Einstein gravity $\eta$ by combining in a model-independent way several observational probes, from redshift distortions, to lensing, to matter clustering.

Information about the video

Date of recording 12/04/2021
Date of publication 30/04/2021
Institution CIRM
Licence CC BY NC ND
Language English
Audience Researchers
Director(s) Guillaume Hennenfent
Format MP4

Citation data

DOI 10.24350/CIRM.V.19745003
Cite this video Amendola, Luca (12/04/2021). Model-independent cosmology. CIRM. Audiovisual resource. DOI: 10.24350/CIRM.V.19745003
URL https://dx.doi.org/10.24350/CIRM.V.19745003

Domain(s)

Bibliography

AMENDOLA, Luca et QUARTIN, Miguel. Measuring the Hubble function with standard candle clustering. arXiv preprint arXiv:1912.10255, 2019. - https://arxiv.org/abs/1912.10255
AMENDOLA, Luca, KUNZ, Martin, MOTTA, Mariele, et al. Observables and unobservables in dark energy cosmologies. Physical Review D, 2013, vol. 87, no 2, p. 023501. - http://dx.doi.org/10.1103/PhysRevD.87.023501
AMENDOLA, Luca, BETTONI, Dario, PINHO, Ana Marta, et al. Measuring gravity at cosmological scales. Universe, 2020, vol. 6, no 2, p. 20. - https://doi.org/10.3390/universe6020020

MSC codes

83F05 Cosmology

Document(s)

https://www.cirm-math.fr/RepOrga/2651/Slides/Luca-Amendola.pdf

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