Dynamical Regularities in Galaxies

TL;DR

This paper reviews the empirical dynamical scaling relations in galaxies, highlighting a set of laws unified by a common acceleration scale across diverse galaxy types.

Contribution

It synthesizes observational data into a cohesive framework of dynamical regularities governed by a universal acceleration scale.

Findings

Galaxies follow strict dynamical scaling relations.

A common acceleration scale links diverse galaxy properties.

Empirical laws describe galaxy dynamics across many types.

Abstract

Galaxies are observed to obey a strict set of dynamical scaling relations. We review these relations for rotationally supported disk galaxies spanning many decades in mass, surface brightness, and gas content. The behavior of these widely varied systems can be summarized with a handful of empirical laws connected by a common acceleration scale.