Dynamical galactic effects induced by stable vortex structure in bosonic dark matter

Abstract

The nature of dark matter (DM) remains one of the unsolved mysteries of modern physics. An intriguing possibility is to assume that DM consists of ultralight bosonic particles in the Bose-Einstein condensate (BEC) state. We study stationary DM structures by using the system of the Gross-Pitaevskii and Poisson equations, including the effective temperature effect with parameters chosen to describe the Milky Way galaxy. We have investigated DM structure with BEC core and isothermal envelope. We compare the spherically symmetric and vortex core states, which allows us to analyze the impact of the core vorticity on the halo density, velocity distribution, and, therefore, its gravitational field. Gravitational field calculation is done in the gravitoelectromagnetism approach to include the impact of the core rotation, which induces a gravimagnetic field. As result, the halo with a vortex core is characterized by smaller orbital velocity in the galactic disk region in comparison with the non-rotating halo. It is found that the core vorticity produces gravimagnetic perturbation of celestial body dynamics, which can modify the circular trajectories.

arXiv comment17 pages, 11 figures

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Cited by in corpus (6)

• Quantum Vortices in Curved Geometries
• Dynamical friction in rotating ultralight dark matter galactic cores
• Vortex Lines in Ultralight Bosonic Dark Matter around Rotating Supermassive Black Holes
• Vortex State of Ultralight Dark Matter and the Fornax Timing Problem
• Equilibrium Core and Vortex Solutions of Bose Einstein Condensate Dark Matter around a Black Hole
• Collective Excitations of Self-Gravitating Ultralight Dark Matter Cores