Kerr black holes

Frame dragging, the ergosphere, and the Penrose process.

Frame dragging and the ergosphere of a Kerr black hole

Frame dragging and the ergosphere of a Kerr black hole

The Kerr shadow: a rotating black hole’s asymmetric silhouette

The Kerr shadow: a rotating black hole's asymmetric silhouette

The Penrose process: extracting a black hole’s rotational energy

The Penrose process: extracting a black hole's rotational energy

Animating the shadow: a black hole spun up from rest

Animating the shadow: a black hole spun up from rest