Dynamical Friction due to fuzzy dark matter on satellites described by axisymmetric logarithmic potentials

Abstract

A plausible dark matter candidate is an ultralight bosonic particle referred to as fuzzy dark matter. The equivalent mass-energy of the fuzzy dark matter boson is $\sim 10^{-22}$eV and has a corresponding de Broglie wavelength of kiloparsec scale, thus exhibiting wave behaviour in scales comparable to a galactic core, which could not appear in conventional cold dark matter models. The presence of fuzzy dark matter in galactic clusters will impact the motion of their members through dynamical friction. In this work, we present simulations of the dynamical friction on satellites traversing an initially uniform fuzzy dark matter halo. We focus on the satellites whose shapes are beyond spherical symmetry described by ellipsoidal and logarithmic potentials. We find that the wakes created on the fuzzy dark matter halo due to the passage of such satellites are qualitatively different from those generated by spherically symmetric ones. Furthermore, we quantify the dynamical friction coefficient for such systems, finding that the same satellite may experience a drag differing by a factor of $5$ depending on its ellipticity and the direction of motion. Finally, we find that the dynamical friction time-scale is close to Hubble time, assuming a satellite of $10^{11}$M${}_{\odot }$ traversing at $10^3$km/s a FDM halo whose mean density is $\sim 10^6$M${}_{\odot }$kpc${}^{-3}$.

17 pages, 7 figures, Accepted by JCAP

References in corpus (12)

• Ultralight scalars as cosmological dark matter
• First star-forming structures in fuzzy cosmic filaments
• $S^5$: Probing the Milky Way and Magellanic Clouds potentials with the 6-D map of the Orphan-Chenab stream
• Cross-correlation Weak Lensing of SDSS Galaxy Clusters III: Mass-to-light Ratios
• Dynamical friction of black holes in ultralight dark matter
• Imprint of the seesaw mechanism on feebly interacting dark matter and the baryon asymmetry
• Global Properties of the Globular Cluster Systems of Four Spiral Galaxies
• On the Random Motion of Nuclear Objects in a Fuzzy Dark Matter Halo
• A Self-Consistent, Time-Dependent Treatment of Dynamical Friction: New Insights regarding Core Stalling and Dynamical Buoyancy
• Dynamical Friction From Ultralight Dark Matter
• Dynamical Friction, Buoyancy and Core-Stalling -- I. A Non-perturbative Orbit-based Analysis
• Dynamical friction in Bose-Einstein condensed self-interacting dark matter at finite temperatures, and the Fornax dwarf spheroidal

Cited by in corpus (4)

• On the Dynamical Heating of Dwarf Galaxies in a Fuzzy Dark Matter Halo
• Structure, Kinematics, and Observability of the Large Magellanic Cloud's Dynamical Friction Wake in Cold vs. Fuzzy Dark Matter
• The Magellanic Clouds are very rare in the IllustrisTNG simulations
• Fuzzy dark matter simulations