139 citations · 749 across the 49 of their papers we have counts for
50 papers
From Landau Equation and Large Deviations to Efficient Simulations of Dynamical Fluctuations
Anwar El Rhirhayi, Jean-Baptiste Fouvry, Julien Barré
The (deterministic) Landau equation captures the mean long-term evolution of dynamically hot long-range interacting finite- systems. Though successful, this kinetic equation fun…
Very long-term relaxation of harmonic 1D self-gravitating systems
Kerwann Tep, Jean-Baptiste Fouvry, Christophe Pichon
One-dimensional self-gravitating systems admit genuine thermodynamical equilibria. For systems with strictly monotonic orbital frequency profile, the Landau and Balescu-Lenard theo…
Thermodynamic blocking in self-gravitating systems
Barnabás Deme, Jean-Baptiste Fouvry
Building upon a thermodynamic formalism, we show that self-gravitating systems in hydrostatic equilibrium with a uniform density are maximal entropy states when submitted to pertur…
Vector Resonant Relaxation and Statistical Closure Theory. II. One-loop Closure
Sofia Flores, Jean-Baptiste Fouvry
We use stellar dynamics as a testbed for statistical closure theory. We focus on the process of "Vector Resonant Relaxation," a long-range, non-linear, and correlated relaxation me…
Kinetic theory of two-dimensional point vortices at order and
Jean-Baptiste Fouvry, Pierre-Henri Chavanis
We investigate the long-term relaxation of a distribution of point vortices in two-dimensional hydrodynamics. To focus on the regime of weak collective amplification, we embed…
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…
Vector Resonant Relaxation and Statistical Closure Theory. I. Direct Interaction Approximation
Sofia Flores, Jean-Baptiste Fouvry
Stars orbiting a supermassive black hole in the center of galaxies undergo very efficient diffusion in their orbital orientations: this is "Vector Resonant Relaxation". Such a dyna…
Kinetic Theory of Stellar Systems: A Tutorial
Chris Hamilton, Jean-Baptiste Fouvry
Stellar systems - star clusters, galaxies, dark matter haloes, and so on - are ubiquitous characters in the evolutionary tale of our Universe. This tutorial article is an introduct…
Non-resonant relaxation of rotating globular clusters
Kerwann Tep, Jean-Baptiste Fouvry, Christophe Pichon
The long-term relaxation of rotating, spherically symmetric globular clusters is investigated through an extension of the orbit averaged Chandrasekhar non-resonant formalism. A com…
Predicting the linear response of self-gravitating stellar spheres and discs with LinearResponse.jl
Michael S. Petersen, Mathieu Roule, Jean-Baptiste Fouvry +2
We present LinearResponse.jl, an efficient, versatile public library written in julia to compute the linear response of self-gravitating (3D spherically symmetric) stellar spheres…
Dynamical large deviations for long-range interacting inhomogeneous systems without collective effects
Ouassim Feliachi, Jean-Baptiste Fouvry
We consider the long-term evolution of an inhomogeneous long-range interacting -body system. Placing ourselves in the dynamically hot limit, i.e. neglecting collective effects,…
Kinetic blockings in long-range interacting inhomogeneous systems
Jean-Baptiste Fouvry, Mathieu Roule
Long-range interacting systems unavoidably relax through Poisson shot noise fluctuations generated by their finite number of particles, . When driven by two-body correlations, i…
Constraining intermediate-mass black holes from the stellar disc of SgrA*
Jean-Baptiste Fouvry, María José Bustamante-Rosell, Aaron Zimmerman
Stars evolving around a supermassive black hole see their orbital orientations diffuse efficiently, a process called "vector resonant relaxation". In particular, stars within the s…
Milankovitch equations with spinors
Barnabás Deme, Jean-Baptiste Fouvry
We investigate the use of spinors to describe the secular evolution of quasi-Keplerian systems. Evaluating their Poisson brackets, we show that the components of a properly-chosen…
Kinetic theory of one-dimensional inhomogeneous long-range interacting -body systems at order without collective effects
Jean-Baptiste Fouvry
Long-range interacting systems irreversibly relax as a result of their finite number of particles, . At order , this process is described by the inhomogeneous Balescu--Lena…
Long-term relaxation of self-gravitating systems
Mathieu Roule, Jean-Baptiste Fouvry, Christophe Pichon +1
We investigate the long-term relaxation of one-dimensional () self-gravitating systems, using both kinetic theory and -body simulations. We consider thermal and Plummer eq…
Astrophysics with the Laser Interferometer Space Antenna
Pau Amaro Seoane, Jeff Andrews, Manuel Arca Sedda +156
The Laser Interferometer Space Antenna (LISA) will be a transformative experiment for gravitational wave astronomy, and, as such, it will offer unique opportunities to address many…
Non-resonant relaxation of anisotropic globular clusters
Kerwann Tep, Jean-Baptiste Fouvry, Christophe Pichon
Globular clusters are dense stellar systems whose core slowly contracts under the effect of self-gravity. The rate of this process was recently found to be directly linked to the i…
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…
Linear response theory and damped modes of stellar clusters
Jean-Baptiste Fouvry, Simon Prunet
Because all stars contribute to its gravitational potential, stellar clusters amplify perturbations collectively. In the limit of small fluctuations, this is described through line…
Resonant and non-resonant relaxation of globular clusters
Jean-Baptiste Fouvry, Chris Hamilton, Simon Rozier +1
Globular clusters contain a finite number of stars. As a result, they inevitably undergo secular evolution (`relaxation') causing their mean distribution function (DF) to evolve on…
Mapping the Galactic centre's dark cluster via Resonant Relaxation
Kerwann Tep, Jean-Baptiste Fouvry, Christophe Pichon +4
Supermassive black holes in the centre of galaxies dominate the gravitational potential of their surrounding stellar clusters. In these dense environments, stars follow nearly Kepl…
Secular Dynamics around a Supermassive Black Hole via Multipole Expansion
Jean-Baptiste Fouvry, Walter Dehnen, Scott Tremaine +1
In galactic nuclei, the gravitational potential is dominated by the central supermassive black hole, so stars follow quasi-Keplerian orbits. These orbits are distorted by gravitati…
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…