Quasi periodic eruptions: Powerful blasts of X-rays could reveal a black hole waking from sleep

The strange X -ray pulses expelled from a recently awake monster hole are the most powerful astronomers they have seen, and can help explain how these cosmic giants emerge from their dream.

A few years ago, astronomers saw mysterious rhythmic signals from a black hole. The exact cause was an uncle, but because the signals seemed to have repeated elements, they were called almost periodic rashes (QPE). Since then, astronomers have discovered a handful or qpe that come …