Gamma radiation doesn't come from anything...well, it doesn't HAVE to. Gamma radiation is really just random fluctuations in Nothingness but CAN be created by something. Kinda the principle behind: "[i]All rectangles are squares, but not all squares are rectangles[/i]" Gravity wells aren't a needed thing. Gravity wells are just the food dye that you put in a glass of water so you can see the currents underneath. (I'm kinda impressed with myself lmao that was a perfect explanation). It's what makes this Hawking Radiation phenomenon visible. All you need is Gamma rad (which, I would say, is just [i]barely[/i] a thing of electromagnetism) which is everywhere...and nowhere...at all points in time, if it breaks lightspeed...