Proceso Penrose
The ergosphere would be the region where the Penrose process could occur. The Penrose process (also called Penrose mechanism) is a process theorized by Roger Penrose by which energy can be extracted from a rotating black hole. This extraction is made possible because the rotational energy of a black hole is not located within the event horizon, but is located in an outer region surrounding the hole called the ergosphere. In this region a particle is necessarily propelled by locomotive concurrence with rotational space-time. All objects in the ergosphere are swept away by a rotational space-time. In this process, if a material object enters the ergosphere of a black hole it is divided in two. The momentum of both pieces of material may be such that one part escapes to infinity, and another part falls through the event horizon into the hole. The escaping piece may possibly have more material-energy than the original piece that entered the ergosphere, so the energy balance is negative. In short, the process results in a decrease in the angular momentum of the black hole, and therefore in a reduction corresponding to an energy transfer where the loss of momentum is converted into energy extracted.
The process obeys the thermodynamic laws of black holes. One consequence of these laws is that if the process is repeated continuously, the black hole could eventually lose its angular momentum and become a non-rotating black hole. Demetrios Christodoulou calculated an upper limit for the total amount of energy that could be extracted through the Penrose process. Details of the ergosphere ArtÃculo principal: Ergosfera
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