507 citations · 8.4k across the 215 of their papers we have counts for
17 papers · 1 filter
Thermodynamics of self-gravitating fermions as a robust theory for dark matter halos: Stability analysis applied to the Milky Way
A. Krut, C. R. Argüelles, P. -H. Chavanis
We present a framework for dark matter (DM) halo formation based on a kinetic theory of self-gravitating fermions together with a solid connection to thermodynamics. Based on maxim…
On the long-term evolution of razor-thin galactic discs: Balescu-Lenard prediction and perspectives
Mathieu Roule, Jean-Baptiste Fouvry, Christophe Pichon +1
In the last five decades, numerical simulations have provided invaluable insights into the evolution of galactic discs over cosmic times. As a complementary approach, developments…
Galactic Rotation Curves of LSB Galaxies using core-halo FDM configurations
Ivan Alvarez-Rios, Tula Bernal, Pierre-Henri Chavanis +1
In this work, we construct galactic halos in order to fit the rotation curves (RCs) of a sample of low surface brightness (LSB) galaxies. These halos are made of Fuzzy Dark Matter…
Orbital alignment and mass segregation in galactic nuclei via vector resonant relaxation
Nathan Magnan, Jean-Baptiste Fouvry, Christophe Pichon +1
Supermassive black holes dominate the gravitational potential in galactic nuclei. In these dense environments, stars follow nearly Keplerian orbits and see their orbital planes rel…
Landau equation for self-gravitating classical and quantum particles: Application to dark matter
Pierre-Henri Chavanis
We develop the kinetic theory of classical and quantum particles (fermions and bosons) in gravitational interaction. The kinetic theory of quantum particles may have applications i…
First star-forming structures in fuzzy cosmic filaments
Philip Mocz, Anastasia Fialkov, Mark Vogelsberger +10
In hierarchical models of structure formation, the first galaxies form in low-mass dark matter potential wells, probing the behavior of dark matter on kiloparsec (kpc) scales. Even…
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…
Dressed diffusion and friction coefficients in inhomogeneous multicomponent self-gravitating systems
Jean Heyvaerts, Jean-Baptiste Fouvry, Pierre-Henri Chavanis +1
General self-consistent expressions for the coefficients of diffusion and dynamical friction in a stable, bound, multicomponent self-gravitating and inhomogeneous system are derive…
The secular evolution of discrete quasi-Keplerian systems. II. Application to a multi-mass axisymmetric disc around a supermassive black hole
Jean-Baptiste Fouvry, Christophe Pichon, Pierre-Henri Chavanis
The drift and diffusion coefficients of the inhomogeneous multi-mass degenerate Landau equation are computed to describe the self-induced resonant relaxation of a discrete self-gra…
Secular diffusion in discrete self-gravitating tepid discs III. Resonant thickening in the tightly wound limit
Jean-Baptiste Fouvry, Christophe Pichon, Pierre-Henri Chavanis
The secular thickening of a discrete self-gravitating galactic disc is investigated using the inhomogeneous multi-component Balescu-Lenard equation. The thick WKB limit for the dif…
Resonant thickening of self-gravitating discs: imposed or self-induced orbital diffusion in the tightly wound limit
Jean-Baptiste Fouvry, Christophe Pichon, Pierre-Henri Chavanis +1
The secular thickening of a self-gravitating stellar galactic disc is investigated using the dressed collisionless Fokker-Planck equation and the inhomogeneous multicomponent Bales…
Functional integral approach to the kinetic theory of inhomogeneous systems
Jean-Baptiste Fouvry, Pierre-Henri Chavanis, Christophe Pichon
We present a derivation of the kinetic equation describing the secular evolution of spatially inhomogeneous systems with long-range interactions, the so-called inhomogeneous Landau…
Secular diffusion in discrete self-gravitating tepid discs II: accounting for swing amplification via the matrix method
Jean-Baptiste Fouvry, Christophe Pichon, John Magorrian +1
The secular evolution of an infinitely thin tepid isolated galactic disc made of a finite number of particles is investigated using the inhomogeneous Balescu-Lenard equation expres…
Secular diffusion in discrete self-gravitating tepid discs I : analytic solution in the tightly wound limit
Jean-Baptiste Fouvry, Christophe Pichon, Pierre-Henri Chavanis
The secular evolution of an infinitely thin tepid isolated galactic disc made of a finite number of particles is described using the inhomogeneous Balescu-Lenard equation. Assuming…
The fermionic King model
Pierre-Henri Chavanis, Mohammed Lemou, Florian Méhats
We study the fermionic King model which may provide a relevant model of dark matter halos. The exclusion constraint can be due to quantum mechanics (for fermions such as massive ne…
Kinetic theory of spatially inhomogeneous stellar systems without collective effects
Pierre-Henri Chavanis
We review and complete the kinetic theory of spatially inhomogeneous stellar systems when collective effects (dressing of the stars by their polarization cloud) are neglected. We s…
Dynamical stability of infinite homogeneous self-gravitating systems: application of the Nyquist method
Pierre-Henri Chavanis
We complete classical investigations concerning the dynamical stability of an infinite homogeneous gaseous medium described by the Euler-Poisson system or an infinite homogeneous s…