Recent numerical relativity simulations have shown that the emission of gravitational waves
during the merger of two supermassive black holes (SMBHs) delivers a kick to the final hole …

Galactic disks are highly responsive systems that often undergo external perturbations and
subsequent collisionless equilibration, predominantly via phase mixing. We use linear …

Hubble (1936) divided the “regular nebulae” into two classes, the spirals and the ellipticals,
defining the latter as “highly concentrated and [showing] no indications of resolution into …

The Jaynes information theoretic philosophy, as applied by Levine, Balian, and others, to the
quantal time evolution problem, is here adopted in order to propose an approximate scheme …

We develop a linear perturbative formalism to compute the response of an inhomogeneous
stellar disk embedded in a nonresponsive dark matter (DM) halo to various perturbations …

We show that nonchaotic multiply periodic particle orbits can exist in a galaxy-like potential
where a small, fast-tumbling nuclear bar is nested inside a main bar that has a slower …

Self-gravitating stellar disks with random motion support both exponentially growing and, in
some cases, purely oscillatory axisymmetric bending modes, unlike their cold disk …

This paper focuses on the statistical properties of chaotic orbit ensembles evolved in triaxial
generalizations of the Dehnen potential which have been proposed recently to model …

This paper presents a critical assessment of certain aspects of collisionless galactic
dynamics, focusing on the interpretation and limitations of the collisionless Boltzmann …

A stable galaxy, if excited above its ground state, oscillates about that ground state. If it is
reasonably robust, it can support oscillations of large amplitude. Normal mode oscillations …