Imaginative, but unlikely. First of all, the x-ray arms and the visible light arms are quite different in composition and in many of their properties, temperature being just one big aspect. it is far more likely that the black hole in the center of the galaxy went through a period of very high activity and what you see in those arms is part of the 'bubble' of hot gas emitted at that time. This is supported by the fact that they found much less gas in the center than expected for a black hole of that size.OK Wolfie, Hold on just a sec, and then i'll desist.
IF Any one will look at this picture of galaxy
M106, a spiral galaxy like the Milky Way,
You'll notice the violet and blue arms of this galaxy are curiously similar in geometry to the more sharply defined arms full of dust and stars. In red and yellowish-white.
Now consider that there are actually two SETS of arms at nearly a right angle to each other, but having the same size and asymmetric geometry AS each other.
Now I don't know about anyone else, but I spy a galaxy suddenly flipped at a 90 degree angle and right out of its own X-ray emissions?!
It is common for black holes and even neutron stars to have disks of gas swirling around them and 'jets' of hot gas coming out from the axis of rotation. With a bit of precession, this fits the x-ray picture we see pretty well.