Open AccessDark matter halo structure in CDM hydrodynamical simulations
Author(s) -
Patricia B. Tissera,
R. Domínguez-Tenreiro
Publication year - 1998
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.1998.01440.x
Subject(s) - physics , halo , dark matter , astrophysics , radius , virial theorem , cuspy halo problem , baryon , dark matter halo , galaxy rotation curve , cold dark matter , range (aeronautics) , astronomy , galaxy , materials science , computer security , computer science , composite material
We have carried out a comparative analysis of the properties of dark matter haloes in N ‐body and hydrodynamical simulations. We analyse their density profiles, shapes and kinematical properties with the aim of assessing the effects that hydrodynamical processes might produce on the evolution of the dark matter component. The simulations performed allow us to reproduce dark matter haloes with high resolution, although the range of circular velocities is limited. We find that for haloes with circular velocities of [150–200] km s −1 at the virial radius, the presence of baryons affects the evolution of the dark matter component in the central region, modifying the density profiles, shapes and velocity dispersions. We also analyse the rotation velocity curves of disc‐like structures and compare them with observational results.