The Shape of Dark Matter Halos as a Strong Cosmological Probe

Autor: Rémy Koskas, Jean-Michel Alimi

Publikováno v: Physical Sciences Forum, Vol 7, Iss 1, p 25 (2023)

Halo Dark Matter (DM) formation is a complex process, intertwining both gravitational and cosmological nonlinear phenomena. One of the manifestations of this complexity is the shape of the resulting present-day DM halos: simulations and observations

Externí odkaz: https://doaj.org/article/7184c7b723814f1389721955a1adb012

Probability distribution and statistical properties of spherically compensated cosmic regions in $\Lambda$CDM cosmology

Autor: Paul de Fromont, Jean-Michel Alimi

Publikováno v: Mon.Not.Roy.Astron.Soc.
Mon.Not.Roy.Astron.Soc., 2018, 475 (2), pp.1912-1924. ⟨10.1093/mnras/stx2948⟩
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2018, 475 (2), pp.1912-1924. ⟨10.1093/mnras/stx2948⟩
Mon.Not.Roy.Astron.Soc., 2018, 475 (2), pp.1912-1924. 〈10.1093/mnras/stx2948〉

The statistical properties of cosmic structures are well known to be strong probes for cosmology. In particular, several studies tried to use the cosmic void counting number to obtain tight constrains on Dark Energy. In this paper we address this que

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5ef53eb932bff437a6bcf89440b372c
https://hal.archives-ouvertes.fr/hal-01807619

DEUS full observable universe simulations: Numerical challenge and outlooks

Autor: Pier Stefano Corasaniti, Vincent Reverdy, Xavier Delaruelle, Jean-Michel Alimi, Irène Balmès, Yann Rasera, Vincent Bouillot, phane Requena, Jean-Noel Richet

Publikováno v: The International Journal of High Performance Computing Applications. 29:249-260

We report the realization of the first cosmological simulations on the scale of the whole observable universe. These simulations have been carried out on 4752 nodes of the Curie supercomputer as a part of the Dark Energy Universe Simulation: Full Uni

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::74a7d2a1caaeb6a10656dc7b9a9ba0ad
https://doi.org/10.1177/1094342015576845

Light propagation through cosmic structures using cosmological simulations

Autor: Yann Rasera, Vincent Reverdy, Jean-Michel Alimi

Publikováno v: 14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories
14th Marcel Grossmann Meeting on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories, Jul 2015, Rome, Italy. pp.2302-2307, ⟨10.1142/9789813226609_0266⟩

International audience; We discuss numerical investigations of the effects of cosmological inhomogeneities on light propagation. A new algorithm directly integrating the geodesics equations has been developed and has been run on very large scale cosm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::023a45b45cc30eb6343b74bf25c851ca
https://doi.org/10.1142/9789813226609_0266

IS DARK ENERGY ABNORMALLY WEIGHTING?

Autor: Jean-Michel Alimi, André Füzfa

Publikováno v: Fuzfa, A &-M. Alimi, J 2006, ' Is Dark Energy Abnormally Weighting? ', Int.J.Mod.Phys.D, vol. 16, pp. 2587-2592 . https://doi.org/10.1142/S0218271807011206, https://doi.org/10.1142/S0218271807011206

We present a new interpretation of dark energy in terms of an \textit{Abnormally Weighting Energy} (AWE). This means that dark energy does not couple to gravitation in the same way as ordinary matter, yielding a violation of the weak and strong equiv

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a01a6b7dbcd6e49fdf07b12470d062a
https://doi.org/10.1142/s0218271807011206