Interference of Dark Matter Solitons and Galactic Offsets

Abstract

By performing numerical simulations, we discuss the collisional dynamics of stable solitary waves in the Schrodinger-Poisson equation. In the framework of a model in which part or all of dark matter is a Bose-Einstein condensate of ultralight axions, we show that these dynamics can naturally account for the relative displacement between dark and ordinary matter in the galactic cluster Abell 3827, whose recent observation is the first empirical evidence of dark matter interactions beyond gravity. The essential assumption is the existence of solitonic galactic cores in the kiloparsec scale. For this reason, we present simulations with a benchmark value of the axion mass $m_a=2\times 10^{-24}$ eV, which is somewhat lower than the one preferred for cosmological structure formation if the field is all of dark matter ($m_a\approx 10^{-22}$eV). We argue that future observations might bear out or falsify this coherent wave interpretation of dark matter offsets.

16 pages, 8 figures. In version 2, discussions and abstract improved, references added

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• Improved limits on interactions of low-mass spin-0 dark matter from atomic clock spectroscopy
• Brief History of Ultra-light Scalar Dark Matter Models
• PyUltraLight: A Pseudo-Spectral Solver for Ultralight Dark Matter Dynamics
• Merger of Dark Matter Axion Clumps and Resonant Photon Emission
• OpenMP GNU and Intel Fortran programs for solving the time-dependent Gross-Pitaevskii equation
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• Delayed collapses of BECs in relation to AdS gravity
• Modifying PyUltraLight to model scalar dark matter with self-interactions
• Scalar Field Dark Matter Spectator During Inflation: The Effect of Self-interaction
• Stable vortex in Bose-Einstein condensate dark matter
• Head-on collision of multi-state ultralight BEC dark matter configurations
• Cosmological constraints on the Multi Scalar Field Dark Matter model
• Investigation of two colliding solitonic cores in Fuzzy Dark Matter models
• Generic initial data for binary boson stars
• Black hole formation in relativistic Oscillaton collisions
• Stable vortex structures in colliding self-gravitating Bose-Einstein condensates
• Behavior of luminous matter in the head-on encounter of two ultralight BEC dark matter halos
• Supermassive Black Holes from self-gravitating Bose-Einstein Condensates comprised of Ultra-light Bosonic Dark Matter
• Path Integral for Non-Paraxial Optics
• Revealing turbulent Dark Matter via merging of self-Gravitating condensates
• Single and merger soliton dynamics in scalar field dark matter with and without self-interactions
• Effective Cross Section of Fuzzy Dark Matter Halos
• The Schr$\ddot{o}$dinger-Poisson equations as the large-N limit of the Newtonian N-body system: applications to the large scale dark matter dynamics
• Lasing on nonlinear localized waves in curved geometry
• Dynamic instabilities and turbulence of merged rotating Bose-Einstein condensates
• The Modified Schrodinger Poisson Equation -- Quantum Polytropes
• Head-on collisions of fuzzy/cold dark matter subhalos
• Tightly bound solitons and vortices in three-dimensional bosonic condensates with the electromagnetically-induced gravity
• Construction of fuzzy dark matter halos with arbitrary initial velocities
• Effects of Self-Interaction and of an Ideal Gas in Binary Mergers of Bosonic Dark Matter Cores
• Integrating factor techniques applied to the Schrödinger-like equations. Comparison with Split-Step methods
• (1+1)-Dimensional Schrödinger-Poisson equation with contact interaction