https://www.bbc.com/news/science-environment-43648152
Citando:
"They report the discovery of a dozen inactive and low-mass "binary systems", in which a star orbits an unseen companion - the black hole.
The supermassive black hole at the centre of the Milky Way, known as Sagittarius A* (Sgr A*), is surrounded by a halo of gas and dust that provides the perfect breeding ground for the birth of massive stars. These stars live, die and could turn into black holes there.
In addition, black holes from outside the halo are believed to fall under the influence of Sgr A* as they lose their energy, causing them to be pulled into its vicinity, where they are held captive by its force.
Some of these bind - or "mate" - to passing stars, forming binary systems."
