Weekly Space Hangout: December 29, 2021 — Do Black Holes Grow as the Universe Expands? Dr. Kevin Croker Explains Cosmological Coupling

In our final episode of 2021 we are excited to welcome Dr. Kevin Croker from University of Hawai’i at Mānoa! Kevin led a team that compared data from simulated black hole mergers with that from gravitational waves detected by the LIGO–Virgo collaboration. This comparison led to a surprising conclusion: ignoring the expansion of the universe may be limiting the scientific understanding of black-hole physics. The team hypothesizes that that as the universe expands outward following the Big Bang, all objects with mass grow as well – and Black Holes are no exception. This new process has been dubbed “Cosmological Coupling.” Read More