https://iopscience.iop.org/article/10.3847/1538-4357/adb972
Once again anything that the Black hole clerics don’t understand, they call a black hole. Or dark energy if they are really desperate. Odd that they’re still at it considering all of the only 3 “images” of supposed ‘black holes’ to date have no accretion discs. Their flimsy excuse is that by some 1/30,000 coincidence all three Black holes images to date are exactly face on to us here on earth. A ‘fact’ even NASA admits is extremely odd and statistically very unlikely. They just can’t admit these images aren’t black holes.
Although one can only speculate on the real nature of the data from another galaxy referred to in this paper cited above, I prefer the variable speed solar Dynamo model to explain the data rather than using the extremely rapid spinning object model as the above cited paper suggests. The variable speed model of the solar Dynamo cycle is a 22 year cycle consisting of two 11 year phases. For 11 years the inner core of the sun rotates faster than its photosphere, and for the next 11 years slower. Etc.
And this solar Dynamo model can be used to also model other repeating phenomena like quasars and pulsars. In that these repeating bursts in X-ray or other frequencies are signs of a very short time scale slowing down and speeding up of the stars inner core relative to its outer plasma shell.
So why have a model of a massive star spinning multiple times per second when it’s more realistic to suggest that the objects in question are spinning much slower in hours or days. And instead, as the variable speed solar Dynamo style model proposes, have the inner core and outer photosphere both spinning in the same direction but slowing down and speeding up relative to each other over seconds. Less drastic and unrealistic assumptions are made in the solar Dynamo style model.
But as mentioned above this dynamo cycle is much faster than the suns 22 year cycle and lasts only just days. And thus being much more energetic. Hence the profuse x ray emissions.
We should be glad our suns cycle is a long 22 year cycle.