185 citations · 585 across the 22 of their papers we have counts for
9 papers · 1 filter
An order-disorder phase transition in black-hole star clusters
Jihad Touma, Scott Tremaine, Mher Kazandjian
The centers of most galaxies contain massive black holes surrounded by dense star clusters. The structure of these clusters determines the rate and properties of observable transie…
Secular Instabilities of Keplerian Stellar Discs
Karamveer Kaur, Mher Kazandjian, S. Sridhar +1
We present idealized models of a razor-thin, axisymmetric, Keplerian stellar disc around a massive black hole, and study non-axisymmetric secular instabilities in the absence of ei…
Stellar Dynamics around a Massive Black Hole III: Resonant Relaxation of Axisymmetric Discs
S. Sridhar, Jihad R. Touma
We study the Resonant Relaxation (RR) of an axisymmetric low mass (or Keplerian) stellar disc orbiting a more massive black hole (MBH). Our recent work on the general kinetic theor…
Stellar Dynamics around a Massive Black Hole II: Resonant Relaxation
S. Sridhar, Jihad R. Touma
We present a first-principles theory of Resonant Relaxation (RR) of a low mass stellar system orbiting a more massive black hole (MBH). We first extend the kinetic theory of Gilber…
Stellar Dynamics around a Massive Black Hole I: Secular Collisionless Theory
S. Sridhar, Jihad R. Touma
We present a theory in three parts, of the secular dynamics of a (Keplerian) stellar system of mass orbiting a black hole of mass . Here we describe the collis…
Vlasov-Poisson in 1D: waterbags
Stéphane Colombi, Jihad Touma
We revisit in one dimension the waterbag method to solve numerically Vlasov-Poisson equations. In this approach, the phase-space distribution function is initially sampled…