That doesn't create a lower limit, just a life expectancy. And the life expectancy is still very long — "within the lifespan of the universe" http://en.m.wikipedia.org/wiki/Micro_black_hole
http://arxiv.org/abs/0908.1803v1 (See the table on page 15)
The lifespan of a 108,000 tonne black hole is ~350 hours. At that mass, its event horizon is .32 attometres across, and the Hawking radiation it emits is measured in gigaelectronvolts.
I assume your point is that a GeV is a minuscule amount of energy, which isn't going to push 130kT around at any speed.
you're quoting a speculative paper.
Hawking radiation has never been directly observed, but it is generally presumed to exist. I haven't read the story extract, but I assume the plan
would be to bleed matter into the micro black hole to
maintain it.
Read the story. In context, the character is talking about how small a natural, primordial black hole can be. There is an obvious lower bound, due to Hawking radiation. I assume your point is that a GeV is a minuscule amount of
energy, which isn't going to push 130kT around at any speed.
Read the paper. That's the pseudotemperature of the event horizon. It's so hot that it's glowing largely in ultraenergetic gamma rays. The total power radiated by a .32 attometre black hole is 5,519 petawatts.