Another of the researchers’ theories is there may be an interaction between the matter being consumed and a secondary body orbiting the black hole, perhaps the remnants of a partially digested star.
New data from Chandra and XMM-Newton imply the size and duration of the black hole’s meals have decreased and the gap between them has increased.
Future observations of this will be crucial to see if the trend continues.
Supermassive black holes are usually larger than the one found on GSN 069, with masses of millions or even billions of suns.
The larger the black hole the slower their fluctuations in brightness will be.
Instead of erupting every nine hours like GSN 069, the should erupt every few months or years which likely explains why “quasi-periodic eruptions” have never been seen before.