Kerr Newman De Sitter (KNdS) Horizons & Ergospheres

In the animation the M:H ratio changes until the Nariai limit is reached. Hubble constant=H, cosmological constant=Λ, black hole mass=M, spin=a, electric charge=℧. The numeric display is in natural dimensionless units of G=c=kε=1. The radii in the numeric display are in the equatorial plane (if a complex value is displayed there is no solution for it on the equator, but there might be some near the poles). Equations & code for this and other general relativity metrics @ http://relativity.yukterez.net/knds-r.html#9 (by Simon Tyran) and a related video (by James Mcinerney) @ https://www.youtube.com/watch?v=lc70u1aWP8w also see this conference (by Leonard Susskind) on the Nariai limit @ https://www.youtube.com/watch?v=asJYkCQ8uJU&t=2307s