For all: The current understanding of blackholes is:
"Although astronomers have never seen a black hole
directly, they can infer their presence by gravitational
effects on nearby stars and the radiation oozing from
a disk of material that feeds the object."
The edge of the oozing disk is the central white
hole eye (see hurricanes), a gravitational current set
by the gravitational conditions at large.
"Scientists also found that X-rays are emitted from a disk by
a different mechanism than those emitted by the jet."
The jet emits electrons. The X-rays come from the explosive
sea of Solar Flares (discharges) generated in the region of
solar matter consisting of 'millions' of Sun masses.