Galactic Dynamics Site

At its heart, the field treats galaxies as many-body systems where stars interact primarily through a smooth gravitational potential. Key areas of study include:

The field is largely defined by a few foundational textbooks and modern interactive guides: Galactic Dynamics: Second Edition - Google Books Galactic Dynamics

: Studying processes like dynamical friction (the "drag" on massive objects moving through a sea of stars) and violent relaxation . Essential Resources At its heart, the field treats galaxies as

: Analyzing how individual stars move within these potentials, including orbits in axisymmetric and triaxial galaxies. This uses the Collisionless Boltzmann Equation and Jeans

: Calculating the gravitational potential generated by various mass distributions, such as disks, bulges, and dark matter halos.

: Explaining the origin and stability of spiral structures through density wave theory.

: Understanding systems where individual stellar encounters are rare enough to be ignored. This uses the Collisionless Boltzmann Equation and Jeans Equations to describe equilibrium.