8 papers
Relaxation in a Fuzzy Dark Matter Halo. II. Self-consistent kinetic equations
Ben Bar-Or, Jean-Baptiste Fouvry, Scott Tremaine
Fuzzy dark matter (FDM) is composed of ultra-light bosons having a de Broglie wavelength that is comparable to the size of the stellar component of galaxies at typical galactic vel…
Kinetic theory of homogeneous long-range interacting systems sourced by effects
Jean-Baptiste Fouvry, Ben Bar-Or, Pierre-Henri Chavanis
The long-term dynamics of long-range interacting -body systems can generically be described by the Balescu-Lenard kinetic equation. However, for homogeneous systems, this…
Tidal disruption event rates in galaxy merger remnants
Hugo Pfister, Ben Bar-Or, Marta Volonteri +2
The rate of tidal disruption events (TDEs) depends sensitively on the stellar properties of the central galactic regions. Simulations show that galaxy mergers cause gas inflows, tr…
Vector Resonant Relaxation of Stars around a Massive Black Hole
Jean-Baptiste Fouvry, Ben Bar-Or, Pierre-Henri Chavanis
In the vicinity of a massive black hole, stars move on precessing Keplerian orbits. The mutual stochastic gravitational torques between the stellar orbits drive a rapid reorientati…
Secular dynamics of long-range interacting particles on a sphere in the axisymmetric limit
Jean-Baptiste Fouvry, Ben Bar-Or, Pierre-Henri Chavanis
We investigate the secular dynamics of long-range interacting particles moving on a sphere, in the limit of an axisymmetric mean field potential. We show that this system can be de…
Relaxation in a Fuzzy Dark Matter Halo
Ben Bar-Or, Jean-Baptiste Fouvry, Scott Tremaine
Dark matter may be composed of light bosons, , with a de Broglie wavelength in typical galactic potentials. Such `fuzzy'…