A mass-dependent density profile for dark matter haloes including the influence of galaxy formation

  title={A mass-dependent density profile for dark matter haloes including the influence of galaxy formation},
  author={Arianna Di Cintio and Chris B. Brook and Aaron A Dutton and Andrea V. Macci{\`o} and Gregory S. Stinson and Alexander Knebe},
  journal={Monthly Notices of the Royal Astronomical Society},
ABSTRACT We introduce a mass dependent density profile to describe the distribution of dark matterwithin galaxies, which takes into account the stellar-to-halo mass dependence of the responseof dark matter to baryonic processes. The study is based on the analysis of hydrodynamicallysimulated galaxies from dwarf to Milky Way mass, drawn from the MaGICC project, whichhave been shown to match a wide range of disk scaling relationships. We find that the bestfit parameters of a generic double power-law… 

Figures and Tables from this paper

The Tully–Fisher and mass–size relations from halo abundance matching
The Tully-Fisher relation (TFR) expresses the connection between rotating galaxies and the dark matter haloes they inhabit, and therefore contains a wealth of information about galaxy formation. We
NIHAO – IV: core creation and destruction in dark matter density profiles across cosmic time
We use the NIHAO (Numerical Investigation of Hundred Astrophysical Objects) cosmological simulations to investigate the effects of baryonic physics on the time evolution of dark matter central
Dark matter–baryon scaling relations from Einasto halo fits to SPARC galaxy rotation curves
Dark matter–baryon scaling relations in galaxies are important in order to constrain galaxy formation models. Here, we provide a modern quantitative assessment of these relations by modelling the
Baryon effects on the internal structure of ΛCDM haloes in the EAGLE simulations
We investigate the internal structure and density profiles of haloes of mass 1010–1014 M⊙ in the Evolution and Assembly of Galaxies and their Environment (EAGLE) simulations. These follow the
The Dekel-Zhao profile: a mass-dependent dark-matter density profile with flexible inner slope and analytic potential, velocity dispersion, and lensing properties
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 applied to
The Effect of Adiabatic Compression on Dark Matter Halos and the Radial Acceleration Relation
We use a semiempirical model to investigate the radial acceleration relation (RAR) in a cold dark matter (CDM) framework. Specifically, we build 80 model galaxies covering the same parameter space as
By means of N-body + hydrodynamic zoom-in simulations we study the evolution of the inner dark matter and stellar mass distributions of central dwarf galaxies formed in halos of virial masses Mv =
The distribution of mass components in simulated disc galaxies
Using 22 hydrodynamical simulated galaxies in a LCDM cosmological context we recover not only the observed baryonic Tully-Fisher relation, but also the observed "mass discrepancy--acceleration"
Dark-matter halos grown in cosmological simulations appear to have central Navarro–Frenk–White-like density cusps with mean values of d log &rgr; / d log r ≈ − 1 ?> , and some dispersion, which is


The dependence of dark matter profiles on the stellar-to-halo mass ratio: a prediction for cusps versus cores
We use a suite of 31 simulated galaxies drawn from the MaGICC project to investigate the effects of baryonic feedback on the density profiles of dark matter haloes. The sample covers a wide mass
Dark Matter Scaling Relations
We investigate the structure of dark matter halos by means of the kinematics of a very large sample of spiral galaxies of all luminosities. The observed rotation curves show a universal profile which
The cores of dwarf galaxy haloes
We use N-body simulations to examine the effects of mass outflows on the density profiles of cold dark matter (CDM) halos surrounding dwarf galaxies. In particular, we investigate the consequences of
The redshift dependence of the structure of massive Λ cold dark matter haloes
We use two very large cosmological simulations to study how the density profiles of relaxedCDM dark halos depend on redshift and on halo mass. We confirm that these profiles deviate slightly but
On the universality of density profiles
The secondary infall model (described in a previous paper by this author), which takes into account the effect of dynamical friction, ordered and random angular momentum, baryon adiabatic contraction
Impact of baryon physics on dark matter structures: a detailed simulation study of halo density profiles
The back-reaction of baryons on the dark matter halo density profile is of great interest, not least because it is an important systematic uncertainty when attempting to detect the dark matter. Here,
Concentration, spin and shape of dark matter haloes: Scatter and the dependence on mass and environment
We use a series of cosmological N-body simulations for a flat A cold dark matter (ACDM) cosmology to investigate the structural properties of dark matter haloes, at redshift zero, in the mass range 3
How do galaxies populate dark matter haloes
For any assumed standard stellar initial mass function, the Sloan Digital Sky Survey (SDSS) gives a precise determination of the abundance of galaxies as a function of their stellar mass over the
Universal IMF versus dark halo response in early-type galaxies: breaking the degeneracy with the Fundamental Plane
We use the relations between aperture stellar velocity dispersion (σap), stellar mass (MSPS), and galaxy size (Re) for a sample of ∼ 150000 early-type galaxies from SDSS/DR7 to place constraints on
Profiles of dark haloes: evolution, scatter and environment
We study dark-matter halo density profiles in a high-resolution N-body simulation of aCDM cosmology. Our statistical sample contains �5000 haloes in the range 10 11 10 14 h −1 M⊙ and the resolution