A test of invariance of halo surface density for FIRE-2 simulations with cold dark matter and self-interacting dark matter
arXiv:2510.26545 · doi:10.1016/j.dark.2026.102265
Abstract
Numerous observations have shown that the dark matter halo surface density, defined as the product of core radius and halo central density of cored dark matter haloes is nearly constant and independent of galaxy mass over a whole slew of galaxy types. Here we calculate the surface density in cold dark matter(CDM) and self-interacting dark matter (SIDM) models including baryons, as well as SIDM without baryons, for dwarf galaxies of masses using mock catalogs obtained from simulations as part of the Feedback In Realistic Environments project. We find that the dark matter surface density and column density are nearly constant for CDM and SIDM for this mass range. The halo surface density obtained from the Burkert profile fit is consistent with galactic-scale observations within . We also computed the empirical scaling relations between the central surface density and maximum velocity using the best-fit dark matter profiles, and found that they agree with observations of Milky Way and M31 dwarfs.
13 pages, 6 figures. Accepted for publication in Physics of Dark Universe
References in corpus (21)
- In the Realm of the Hubble tension a Review of Solutions
- Challenges for CDM: An update
- The Radial Acceleration Relation in Rotationally Supported Galaxies
- The redshift dependence of the structure of massive LCDM halos
- The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
- A mass-dependent density profile for dark matter haloes including the influence of galaxy formation
- The Uchuu Simulations: Data Release 1 and Dark Matter Halo Concentrations
- GHASP : an H alpha kinematic survey of spiral and irregular galaxies. V. Dark matter distribution in 36 nearby spiral galaxies
- From galactic bars to the Hubble tension: weighing up the astrophysical evidence for Milgromian gravity
- SIDM on FIRE: Hydrodynamical Self-Interacting Dark Matter simulations of low-mass dwarf galaxies
- Anomalies in Physical Cosmology
- Cosmology and Convention
- Fuzzy Dark Matter and Dark Matter Halo Cores
- On the surface density of dark matter haloes
- LCDM halo substructure properties revealed with high resolution and large volume cosmological simulations
- Multi-wavelength mock galaxy catalogs of the low-redshift Universe
- A tight scaling relation of dark matter in galaxy clusters
- Scaling relations for dark matter core density and radius from Chandra X-ray cluster sample
- A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups
- A test of invariance of dark matter halo surface density using multiwavelength mock galaxy catalogues
- Central densities of dark matter halos in FIRE-2 simulations of low-mass galaxies with cold dark matter and self-interacting dark matter