Could a suspicious pair of active black holes improve the outlook for seeing the gravitational wave background?
Gravitational waves are believed to be able to “kick” black hole merger remnants out of their host galaxy. We can search for signatures of that kick directly in gravitational wave signals.
Supermassive black holes are among the most exciting objects in the universe. Even more so, when they dance around each other after the merger of two galaxies.
Given what we know about our universe, what is the most massive possible observable galaxy at a given time?
Last year’s discovery of CR7, an intriguing galaxy in the early universe, encouraged many exotic explanations. New observations somewhat spoil the party
Every massive galaxy hosts a supermassive black hole – but how do these cosmic monsters affect the stars they share their galaxy with?