New model of density distribution for fermionic dark matter halos
| Autor: | Denys Savchenko, Anton Rudakovskyi |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Cosmology and Nongalactic Astrophysics (astro-ph.CO) 010308 nuclear & particles physics Dark matter General Physics and Astronomy FOS: Physical sciences Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Astrophysics - Astrophysics of Galaxies Galaxy Core (optical fiber) Distribution (mathematics) Astrophysics of Galaxies (astro-ph.GA) 0103 physical sciences Navarro–Frenk–White profile Warm dark matter Particle Halo 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | In this paper, we formulate a new model of density distribution for halos made of warm dark matter (WDM) particles. The model is described by a single microphysics parameter - the mass (or, equivalently, the maximal value of the initial phase-space density distribution) of dark matter particles. Given the WDM particle mass and the parameters of a dark matter density profile at the halo periphery, this model predicts the inner density profile. In case of initial Fermi-Dirac distribution, we successfully reproduce cored dark matter profiles from N-body simulations. Also, we calculate the core radii of warm dark matter halos of dwarf spheroidal galaxies for particle masses $m_\text{FD}=$100, 200, 300 and 400 eV. published in Ukrainian Journal of Physics |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|