Dwarf galaxies in CDM and SIDM with baryons: observational probes of the nature of dark matter

Abstract

We present the first cosmological simulations of dwarf galaxies, which include dark matter self-interactions and baryons. We study two dwarf galaxies within cold dark matter, and four different elastic self-interacting scenarios with constant and velocity-dependent cross sections, motivated by a new force in the hidden dark matter sector. Our highest resolution simulation has a baryonic mass resolution of $1.8\times 10^2{\mathrm{M}}_{\odot }$ and a gravitational softening length of $34\mathrm{pc}$ at $z=0$. In this first study we focus on the regime of mostly isolated dwarf galaxies with halo masses $\sim 10^{10}{\mathrm{M}}_{\odot }$ where dark matter dynamically dominates even at sub-kpc scales. We find that while the global properties of galaxies of this scale are minimally affected by allowed self-interactions, their internal structures change significantly if the cross section is large enough within the inner sub-kpc region. In these dark-matter-dominated systems, self-scattering ties the shape of the stellar distribution to that of the dark matter distribution. In particular, we find that the stellar core radius is closely related to the dark matter core radius generated by self-interactions. Dark matter collisions lead to dwarf galaxies with larger stellar cores and smaller stellar central densities compared to the cold dark matter case. The central metallicity within $1\mathrm{kpc}$ is also larger by up to $\sim 15\%$ in the former case. We conclude that the mass distribution, and characteristics of the central stars in dwarf galaxies can potentially be used to probe the self-interacting nature of dark matter.

16 pages, 11 figures. MNRAS accepted

References in corpus (14)

• Introducing the Illustris Project: Simulating the coevolution of dark and visible matter in the Universe
• A Theory of Dark Matter
• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• Properties of galaxies reproduced by a hydrodynamic simulation
• Introducing the Illustris Project: the evolution of galaxy populations across cosmic time
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• Cores in Dwarf Galaxies from Dark Matter with a Yukawa Potential
• High-resolution dark matter density profiles of THINGS dwarf galaxies: Correcting for non-circular motions
• Is dark matter with long-range interactions a solution to all small-scale problems of ΛCDM cosmology?
• The Cold Dark Matter Halos of Local Group Dwarf Spheroidals
• Scaling Relations and the Fundamental Line of the Local Group Dwarf Galaxies
• Using the Milky Way satellites to study interactions between cold dark matter and radiation
• A First Attempt to Calibrate the Baryonic Tully-Fisher Relation with Gas Dominated Galaxies
• Scattering, Damping, and Acoustic Oscillations: Simulating the Structure of Dark Matter Halos with Relativistic Force Carriers

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