ΛCDM is alive and well

Autor: Alain Blanchard, Jean-Yves Héloret, Stéphane Ilić, Brahim Lamine, Isaac Tutusaus

Publikováno v: The Open Journal of Astrophysics, Vol 7 (2024)

Despite its successes, the $\Lambda$CDM model faces several tensions with recent cosmological data and their increased accuracy. The mismatch between the values of the Hubble constant $H_0$ obtained from {some} direct distance ladder measurements and

Externí odkaz: https://doaj.org/article/23e89d75b5134f1e9da931d4c3456d24

Gravitation and the Universe from large scale-structures: The GAUSS mission concept Mapping the cosmic web up to the reionization era

Autor: Stéphane Ilić, Emmanuel Gangler, Safir Yahia-Cherif, A. J. Hawken, Yann Rasera, Satya Gontcho A Gontcho, Jean-Paul Kneib, E. Aubourg, Norma G. Sanchez, Alain Blanchard, Guilhem Lavaux, Sandrine Codis, Julien Lesgourgues, Yannick Mellier, Olivier Le Fevre, C. Renault, Agnès Ferté, Fabien Dournac, Z. Sakr, Stephanie Escoffier, I. Tutusaus, M. Ricci, Philippe Brax, Pablo Fosalba, Fabio Finelli, Jérémy Neveu, Francisco J. Castander, Martin Kunz

Publikováno v: Experimental Astronomy
Experimental Astronomy, 2021, 51 (3), pp.1623-1640. ⟨10.1007/s10686-021-09717-9⟩
Digital.CSIC. Repositorio Institucional del CSIC
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Exper.Astron.
Exper.Astron., 2021, 51 (3), pp.1623-1640. ⟨10.1007/s10686-021-09717-9⟩

Blanchard, A., et al.
Today, thanks in particular to the results of the ESA Planck mission, the concordance cosmological model appears to be the most robust to describe the evolution and content of the Universe from its early to late times. It s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3442b59b65eb405eb0a318842df84a3f
http://hdl.handle.net/10261/260224

Multi-tasking the growth of cosmological structures

Autor: Louis Perenon, Michelle Lochner, Matteo Martinelli, Chris Clarkson, Stéphane Ilić, Roy Maartens

Publikováno v: Phys.Dark Univ.
Phys.Dark Univ., 2021, 34, pp.100898. ⟨10.1016/j.dark.2021.100898⟩

Next-generation large-scale structure surveys will deliver a significant increase in the precision of growth data, allowing us to use `agnostic' methods to study the evolution of perturbations without the assumption of a cosmological model. We focus

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe0c3c129b42ae695d3bbe5151bca8b7
https://hal.archives-ouvertes.fr/hal-03229345

Improvements in cosmological constraints from breaking growth degeneracy

Autor: Stéphane Ilić, Roy Maartens, Louis Perenon, Álvaro de la Cruz-Dombriz

Publikováno v: Astronomy and Astrophysics-A&A
Astronomy and Astrophysics-A&A, EDP Sciences, 2020, 642, pp.A116. ⟨10.1051/0004-6361/202038409⟩
Perenon, L, Ilić, S, Maartens, R & Cruz-Dombriz, A D L 2020, ' Improvements in cosmological constraints from breaking growth degeneracy ', Astronomy and Astrophysics, vol. 642, A116, pp. 1-8 . https://doi.org/10.1051/0004-6361/202038409

The key probes of the growth of large-scale structure are its rate $f$ and amplitude $\sigma_8$. Redshift space distortions in the galaxy power spectrum allow us to measure only the combination $f\sigma_8$, which can be used to constrain the standard

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2912431ed6144b2ed98eed26e13f0f9
https://hal.archives-ouvertes.fr/hal-02634685

The baryon fraction in clusters and scaling relations in LCDM from X-ray and Planck data

Autor: Stéphane Ilić, M. Douspis, Alain Blanchard

Publikováno v: Proceedings of Frontiers of Fundamental Physics 14 — PoS(FFP14).

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8610fec1a76ca5227b98776b970c5ef5
https://doi.org/10.22323/1.224.0083