As a black hole including the black hole universe accretes its outside matter and radiation, it expands and cools down.
Figure 4 plots the energy of X-rays emitted by the massive black hole Sgr A* when it accretes an object as a function of the object mass.
In future, when Sgr A* accretes a star including neutron star daily (or yearly for a large star), an active galactic nucleus (AGN) or quasar will form or is born in our galaxy.
For the radiation observed at the Earth, the spectral flux of an X-ray flare produced by the dynamic massive black hole Sgr A*, when it accretes an object, is given by,
As John's syndetic sensibility accretes
, he attains his ability to (re)voice the story of the ancestors.
Many smaller black holes may be all but invisible as they wander alone with no nearby material to accrete. But if two black holes have the same food supply, the heavier beast will devour matter faster, and thus emit more X-rays, than its lighter counterpart.
As King explains, "A black hole that's trying to accrete at its upper limit will blow out a lot of material."
The occurrence of such an outburst, detected by Japan's Ginga X-ray astronomy satellite, raises serious questions about how well astronomers understand what happens when a neutron star collects, or accretes
, matter from an orbiting companion star.
For years astronomers have known that a 10-solar-mass black hole accretes
matter from a 30-solar-mass blue supergiant companion and ejects two X-ray-emitting jets in opposite directions.
The black hole has a mass of about 30 million Suns, but it appears much dimmer in X-rays than expected, meaning it accretes
matter extremely inefficiently.