PBS Space Time PBS Space Time

How To Capture Black Holes

Sep 14, 2026 · 19m

Summary

This episode explores the hypothesis that stellar-mass black holes merge within the accretion disks of supermassive black holes, explaining unexpectedly massive LIGO detections. It reviews 2019 papers predicting how gas drag and migration traps facilitate these mergers and proposes that the resulting ultraviolet flashes could be detected by telescopes. The discussion also touches on cosmic inflation and the cosmological natural selection theory, addressing listener questions about black holes potentially birthing new universes.

Topics discussed

Sponsors: LinkedIn and Gatorade Intro: Black holes in quasars and LIGO history The black hole swarm in galactic centers Sponsors: LinkedIn and Gatorade Accretion disks and black hole growth Migration traps and binary formation Sponsors: LinkedIn and Gatorade Predicted masses and spin distributions Detecting electromagnetic counterparts Sponsors: LinkedIn, USAA, and intro to comments Q&A: Cosmological natural selection and universes Sponsors: Anthropic, Amex, and McDonald's
Listen ad-free on Castria