Accretion Disk Temperature Gradient (2D)

A purely 2D companion to the 3D accretion-disk temperature-gradient scene: instead of an orbiting particle field, this model computes the real Shakura-Sunyaev thin-disk temperature profile T(r) ∝ r^-0.75 directly and renders it two ways at once — as an exact blackbody color-temperature ring on the left, and as a live T(r)-versus-radius graph on the right. Central-mass and accretion-rate sliders shift the whole profile together through the real T ∝ (Ṁ·M)^0.25 scaling law, so you can watch a stellar-mass, high-accretion disk run white-hot at every radius while a supermassive, low-accretion disk stays a cool, faint red — the same shape, a different overall temperature scale.