hawking radiation for realistic black holes is a minuscule effect, and the bigger the black hole, the less radiation there is.
The new paper models the hawking radiation for a collapsing star before it makes a black hole.
The temperature of Cygnus X-1 from hawking radiation is roughly a billionth of a degree above absolute zero.
|Hawking radiation |
A form of radiation believed to emanate from black holes, emerging from the region just beyond the black hole's event horizon (from which no radiation can emerge). Pairs of virtual particles and antiparticles, created naturally in the vacuum fluctuation near the black hole, are split apart, one particle falling into the black hole and the other radiating away. The energy lost to such radiated particles is believed to come from the mass of the black hole.