1304.7360 (A. A. Grib et al.)

Geodesics with negative energy in the ergosphere of rotating black holes    [PDF]

A. A. Grib, Yu. V. Pavlov

It is shown that the equatorial geodesics with negative energy for rotating black holes cannot originate or terminate inside the ergosphere. Their length is always finite and this leads to conclusion that they must originate and terminate inside the gravitational radius of the ergosphere.

View original: http://arxiv.org/abs/1304.7360