Ultramassive Black Holes and Their Galaxies: A Matter of Scale

January 05, 2026 Universe Today

Ultramassive Black Holes and Their Galaxies: A Matter of Scale
By Brian Koberlein (https://ift.tt/9U4zlIN)

Artist's impression of an active supermassive black hole in the early universe. Credit: NOIRLab/NSF/AURA/J. da Silva

There is a strong relation between the size of a galaxy's black hole and the motion of stars in the galaxy's core, known as the M-sigma relation. It turns out this relation doesn't work well for galaxies with ultramassive black holes.

January 5, 2026 at 10:43PM
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