Thermalization, Fragmentation and Tidal Disruption: The Complex Galactic Dynamics of Dark Matter Superfluidity

Abstract

The idea of self-interacting bosonic dark matter capable of exhibiting superfluidity is revisited. We show that the most interesting parameter space of the theory corresponds to fully thermalized dark matter halos. As a result the entire halo undergoes Bose-Einstein condensation due to high degeneracy. Since it is observationally preferable for the dark matter density profile to be similar to cold dark matter in the outskirts of the halo, we argue that the Jeans wavelength must be at least few times shorter than the virial radius. This entails that, upon condensation, a dark matter halo fragments into superfluid clumps. However, we demonstrate that these would-be solitons experience strong tidal disruption and behave as virialized weakly interacting streams. An exception is the central soliton, which can be as large as few tens of kiloparsecs in size without contradicting observational bounds. As a result, in dwarf galaxies, the observed rotation curves can be completely contained within the superfluid soliton. In this case, the dark matter distribution is expected to be strongly sensitive to the baryonic density profile. We argue that the diversity of rotation curves observed for dwarf galaxies is a natural consequence of the superfluid dark matter scenario.

arXiv comment28+1 pages, 4 figures

References in corpus (52)

• The Structure of Cold Dark Matter Halos
• Observational evidence for self-interacting cold dark matter
• Cold and Fuzzy Dark Matter
• Ultralight scalars as cosmological dark matter
• Small-Scale Challenges to the $\Lambda$CDM Paradigm
• Cold dark matter haloes in the Planck era: evolution of structural parameters for Einasto and NFW profiles
• Direct constraints on the dark matter self-interaction cross-section from the merging galaxy cluster 1E0657-56
• The Baryonic Tully-Fisher Relation
• The Radial Acceleration Relation in Rotationally Supported Galaxies
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• Quintessential inflation
• Subhaloes in Self-Interacting Galactic Dark Matter Haloes
• Dark Matter Halos as Particle Colliders: A Unified Solution to Small-Scale Structure Puzzles from Dwarfs to Clusters
• Mass-radius relation of Newtonian self-gravitating Bose-Einstein condensates with short-range interactions: I. Analytical results
• Bose-Einstein Condensation of Dark Matter Axions
• The unexpected diversity of dwarf galaxy rotation curves
• The Baryonic Tully-Fisher Relation of Gas Rich Galaxies as a Test of LCDM and MOND
• Ultra-Light Dark Matter
• One Law To Rule Them All: The Radial Acceleration Relation of Galaxies
• Repulsive Dark Matter
• Dynamical Friction and the Distribution of Dark Matter in Barred Galaxies
• The distribution of dark matter in galaxies
• The small scatter of the baryonic Tully-Fisher relation
• Do Dark Matter Axions Form a Condensate with Long-Range Correlation?
• How the Self-Interacting Dark Matter Model Explains the Diverse Galactic Rotation Curves
• Theory of Dark Matter Superfluidity
• Quantum Break-Time of de Sitter
• Tidal Tails Test the Equivalence Principle in the Dark Sector
• Cosmic axion thermalization
• Structure formation in large-volume cosmological simulations of fuzzy dark matter: Impact of the non-linear dynamics
• Noninteracting dark matter
• Dark Matter Superfluidity and Galactic Dynamics
• The mass discrepancy acceleration relation in a $\Lambda$CDM context
• The Milky Way's Halo and Subhalos in Self-Interacting Dark Matter
• The scatter, residual correlations and curvature of the SPARC baryonic Tully-Fisher relation
• Phenomenological consequences of superfluid dark matter with baryon-phonon coupling
• Construction of Wave Dark Matter Halos: Numerical Algorithm and Analytical Constraints
• Bar instability in disk-halo systems
• An accurate measurement of the baryonic Tully-Fisher relation with heavily gas-dominated ALFALFA galaxies
• Sub-MeV Dark Matter and the Goldstone Modes of Superfluid Helium
• Classicality and Quantum Break-Time for Cosmic Axions
• Ruling Out Bosonic Repulsive Dark Matter in Thermal Equilibrium
• Sub-GeV Dark Matter in Superfluid He-4: an Effective Theory Approach
• Dynamical Friction in Superfluids
• Coherent and incoherent structures in fuzzy dark matter halos
• The Equation of State of Dark Matter Superfluids
• Self-Interacting Superfluid Dark Matter Droplets
• Constraints on self-interacting Bose-Einstein condensate dark matter using large-scale observables
• Background Field Method and Initial-Time Singularity for Coherent States
• Core Fragmentation in Simplest Superfluid Dark Matter Scenario
• On Effective Theory of Superfluid Phonons
• Finite Temperature Description of an Interacting Bose Gas

Cited by in corpus (4)

• Short Review of the main achievements of the Scalar Field, Fuzzy, Ultralight, Wave, BEC Dark Matter model
• Superfluid Dark Matter around Black Holes
• Constraining Self-interacting Scalar Field Dark Matter From the Black Hole Shadow of the Event Horizon Telescope
• Mapping the Distorted Dark Matter Distribution of the LMC-SMC System Prior to Milky Way Infall with Basis Function Expansions