In the heart of a trainwreck galaxy: potential for future gravitational waves
Could a suspicious pair of active black holes improve the outlook for seeing the gravitational wave background?
Finding a Supermassive Black Hole’s Stellar-Mass Friends
An archival X-ray search reveals that supermassive black holes at the center of galaxies may be surrounded by stellar-mass black hole companions.
Small, but Mighty! A galaxy robbed of its stars but contains a supermassive secret.
Today’s paper explores a rather interesting galaxy which seems to have a black hole much more massive than expected, and whether it’s next-door neighbour had anything to do with it…!
Recoil detectives: searching for black hole kicks using gravitational waves
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 Tango in a Distant Quasar
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.
How big can galaxies and black holes get?
Given what we know about our universe, what is the most massive possible observable galaxy at a given time?