Work

Inner structure of dark matter halos at high z in cosmological models with non-power-law primordial spectra

Year: 2024

Type: article

Abstract: We consider three cosmological models with non-power-law spectra of primordial density perturbations and test them against $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ in density profiles of dark matter halos. We found that, despite the significant difference in initial conditions, the mean density profiles of all models are still close to the Navarro-Frenk-White one, albeit with some dispersion. We demonstrate that the density profile slopes in the innermost part of the halo have a significant evolution with $z$, which can be used to identify the cosmological model. We also present a toy model resulting in the appearance of core in the central part of the dark matter halo.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/physrevd.110.083530

Authors: M. V. Tkachev, S. V. Pilipenko, E. V. Mikheeva, V. N. Lukash

Institutions: P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Astro Space Center

Language: English

Topic: Galaxies: Formation, Evolution, Phenomena

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funder: Russian Science Foundation

Award: G1274348120