Supermassive black holes (SMBHs) are the churning engines of galaxies, but astrophysicists aren’t exactly sure how two of them merge. While evidence suggests this occurs, we’ve never seen a merger ...

In a new study, scientists from Canada have proposed a solution to the final parsec problem of supermassive black hole (SMBH) mergers using self-interacting dark matter. When two galaxies merge, gas ...