https://arxiv.org/abs/2310.02892

Using NASA’s Chandra X-ray Observatory, astronomers have identified an exhaust vent attached to a “chimney” of hot gas near the center of our Milky Way galaxy. This chimney and exhaust vent are located around the supermassive black hole known as Sagittarius A* (or Sgr A* for short). 

Researchers: Scott C. Mackey, Mark R. Morris, Gabriele Ponti, Konstantina Anastasopoulou, Samaresh Mondal

The authors see it as a result of a sequence of accretion events.

Further research required to determine other non-gravitational factors involved or more decisive.