Publication Year: 1974
DOI: https://doi.org/10.1086/152959
Abstract: view Abstract Content by the Penrose process. It is shown that in no Graphics case can one obtain energies which are greater by a Metrics significant factor than those which already could be obtained by Export a similar breakup process without the presence of a black Citation hole. Subject headings: Show more
Authors:
Publication Year: 2018
DOI: https://doi.org/10.1093/mnrasl/sly073
Abstract: In this distinguishing signature of the process for high magnetic field regime; viz feature BZ. We would like to make a clear prediction that of similar simulation studies of MHD flows for low magnetic field Magnetic regime, where BZ would be inoperative, would also have super Penrose efficiency. process (MPP) Show more
Authors:
Publication Year: 2012
DOI: https://doi.org/10.1103/physrevlett.109.121101
Abstract: Collisions of an work on collisional Penrose processes (Piran & Shaham 1977) we arbitrarily show that even under the most favorable idealized conditions the large maximal energy of an escaping particle is only a modest center factor above the total initial energy of the colliding particles. of This implies that Show more
Authors:
Publication Year: 1977
DOI: https://doi.org/10.1103/physrevd.16.1615
Abstract: In this energies Penrose processes seem to be quite unique to black holes, of and further thought might be given to their possible realizations particles in astrophysics. The processes are only effective in rapidly rotating which black holes. escape to infinity after a collision paper, in black-hole ergospheres. A few Show more
Authors:
Publication Year: 2005
DOI: https://doi.org/10.1111/j.1365-2966.2005.08974.x
Abstract: In this magnetohydrodynamic are seen inside the ergosphere and the so-called MHD Penrose (MHD) process does not operate. However, the rotational energy of the simulations black hole continues to be extracted via the purely electromagnetic for Blandford–Znajek mechanism. In spite of this, no strong relativistic outflows the from the black Show more
Authors:
Publication Year: 1985
DOI: https://doi.org/10.1086/162952
Abstract: view Abstract Content particle must itself be relativistic. In this paper, it is Graphics shown that the inconvenient requirement of relativistic splitting could be Metrics easily overcome for a black hole immersed in an electromagnetic Export field. Publication: The Astrophysical Journal Pub Date: March 1985 DOI: Citation 10.1086/162952 Bibcode: 1985ApJ...290...12W Show more
Authors:
Publication Year: 2014
DOI: https://doi.org/10.1103/physrevd.89.024041
Abstract: In the for the Penrose process to occur is for the Noether current the (the conserved energy-momentum density vector) to be spacelike or past Penrose directed (timelike or null) on some part of the horizon. process In the particle case, our general criterion for the occurrence to of a Penrose Show more
Authors:
Publication Year: 2015
DOI: https://doi.org/10.1103/physrevlett.114.251103
Abstract: Soon after that that these studies underestimated the maximum efficiency by about 1 superradiance order of magnitude (i.e., η≲15). In this work we show can that particle collisions in the vicinity of rapidly rotating black be holes can produce high-energy ejecta and result in high efficiencies exploited under much more Show more
Authors:
Publication Year: 2021
DOI: https://doi.org/10.3390/universe7110416
Abstract: We present modifications acceleration of charged particles up to ultra-high energy E∼1022 eV in around magnetized supermassive black holes with mass M∼1010M⊙ and magnetic relation intensity B∼104 G. Similarly high energies can be obtained by to the electric Penrose process. The extraordinary case is represented by the the radiative Penrose Show more
Authors:
Publication Year: 2016
DOI: https://doi.org/10.1103/physrevd.93.043015
Abstract: The c.m. place maximal energy and the maximal efficiency for several physical scenarios: within pair annihilation, Compton scattering, and the elastic scattering of two the massive particles. In all physically reasonable cases (in which the ergosphere incident particles initially fall from infinity towards the black hole), of the maximal energy Show more
Authors:
Publication Year: 2018
DOI: https://doi.org/10.1103/physrevd.97.084032
Abstract: Superradiant scattering in occurs also for horizonless geometries, where it leads to an many ergoregion instability. Ultracompact, horizonless geometries will usually respond with echoes contexts, of growing amplitude, until rotational (or electrostatic) energy is extracted and from the object. (iii) The Fourier-domain analysis leads to absence which of superradiance when Show more
Authors:
Publication Year: 2009
DOI: https://doi.org/10.3938/jkps.54.2503
Abstract: Not available
Authors:
Publication Year: 1985
DOI: https://doi.org/10.1007/bf02715080
Abstract: Not available
Authors:
Publication Year: 2018
DOI: https://doi.org/10.1007/s10714-018-2373-5
Abstract: Not available
Authors:
Publication Year: 1986
DOI: https://doi.org/10.1086/164390
Abstract: view Abstract Content developed, obtaining an equation to a mass-hyperbola defined by mass Graphics parameters of fragments resulting from the disintegration of a particle Metrics incident on the black hole. The efficiency of the PP Export is considered, analyzing all the factors contributing toward high efficiency Citation along with the Show more
Authors:
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