ergosphere

(redirected from ergospheres)

ergosphere

[′ər·gə‚sfir]
(relativity)
The region outside the event horizon but inside the stationary limit of a Kerr black hole, within which no object can appear stationary to a distant observer. Also known as ergoregion.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Visser, "Acoustic black holes: horizons, ergospheres and Hawking radiation," Classical and Quantum Gravity, vol.
In Section 2, we present horizons, ergospheres, and ergoregions.
There are four cases for the existence of ergospheres and ergoregions shown in Figure 2.
In the black hole case, ergospheres and ergoregions exist for any density profile (the curve (3a) for the case of two horizons and the curve (3b) for the double-horizon case).
For black holes, ergospheres and ergoregions exist for any density profile.
Caption: Figure 2: Four cases for the existence of ergospheres and ergoregions.
Ergosphere is a surface of a static limit [g.sub.tt] = 0 given by
Each point of the ergosphere belongs to some of confocal ellipsoids (7) covering the whole space as the coordinate surfaces r = const.