Physics¶ How Galacticus Works Components Operators Functions Engine Definitions and Conventions Used in Galacticus Halo Masses and Dark Matter Mass Luminosity Units Peculiar Velocities Gravitational Potentials Radius Specifiers Half-mode and quarter-mode masses Node Components (Supermassive) Black Hole Hot Halo Galactic Disk Galactic Spheroid Basic Properties Position Satellite Orbit Dark Matter Halo Spin Dark Matter Profile