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

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An artist’s impression of gas and dust around the massive black hole at the centre of the galaxy SDSS1335+0728

ESO/M. Kornmesser

Strange X-ray pulses blasted out from a recently awakened monster black hole are the most powerful astronomers have seen, and may help explain how these cosmic behemoths emerge from their slumber.

A few years ago, astronomers spotted mysterious rhythmic signals coming from a black hole. The exact cause was unclear, but because the signals appeared to have repeating elements, they were dubbed quasi periodic eruptions (QPEs). Since then, astronomers have discovered a handful of QPEs coming…



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