3 papers
astro-ph.CO2024
Breaking the cosmological invariance of the dark matter halos shape as a new probe of modified gravity
Remy Koskas, Jean-Michel Alimi
In a recent paper, Alimi & Koskas highlighted in CDM models derived from general relativity (GR) (with Dark Energy Universe numerical simulation data), a cosmological invariance…
astro-ph.CO2024
The shape of dark matter halos: a new fundamental cosmological invariance
Jean-Michel Alimi, Remy Koskas
We focus on the complex relationship between the shape of dark matter halos and the cosmological models underlying their formation. We used three realistic cosmological models from…
astro-ph.GA2020
The Dekel-Zhao profile: A mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
Jonathan Freundlich, Fangzhou Jiang, Avishai Dekel +6
We explore a function with two shape parameters for the dark-matter halo density profile subject to baryonic effects, which is a special case of the general Zhao family of models a…