Author
Yu. V. Pavlov
Other affiliations: Russian Academy, Kazan Federal University
Bio: Yu. V. Pavlov is an academic researcher from Russian Academy of Sciences. The author has contributed to research in topics: Black hole & Scalar field. The author has an hindex of 19, co-authored 86 publications receiving 1056 citations. Previous affiliations of Yu. V. Pavlov include Russian Academy & Kazan Federal University.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, it is shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones existing in Nature.
111 citations
TL;DR: In this article, the scattering energy of particles in the center-of-mass reference frame of rotating black holes has been investigated both outside and inside the black hole and it has been shown that the energy of a particle in this frame can acquire very large values not only for extremal black holes but also for nonextremal ones if one takes into account multiple scattering.
Abstract: Scattering of particles with different masses and energy in the gravitational field of rotating black holes is considered both outside and inside the black hole. Expressions for scattering energy of particles in the center-of-mass reference frame are obtained. It is shown that the scattering energy of particles in this frame can acquire very large values not only for extremal black holes but also for nonextremal ones if one takes into account multiple scattering. Numerical estimates for the time needed for a particle to get ultrarelativistic energy are given.
103 citations
TL;DR: In this article, it was shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones if one takes into account multiple scattering.
Abstract: Scattering of particles with different masses and energy in the gravitational field of rotating black holes is considered as outside as inside the black hole. Expressions for scattering energy of particles in the centre of mass system are obtained. It is shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones if one takes into account multiple scattering. Numerical estimates for the time needed for the particle to get ultrarelativistic energy are given.
83 citations
TL;DR: In this paper, it was shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones.
Abstract: Scattering of particles in the gravitational field of rotating black holes is considered. It is shown that scattering energy of particles in the centre of mass system can obtain very large values not only for extremal black holes but also for nonextremal ones. Extraction of energy after the collision is investigated. It is shown that due to the Penrose process the energy of the particle escaping the hole at infinity can be large. Contradictions in the problem of getting high energetic particles escaping the black hole are resolved.
73 citations
TL;DR: In this article, a classification of all such geodesics with energies E/m ≤ 1 for the Schwarzschild and Kerr black holes is given, and the possibility of observation of high energy particles arriving from a black hole on the Earth is discussed.
Abstract: Geodesic completeness needs that near the horizon of a black hole there exist “white hole” geodesics, coming from the region inside the horizon. We give a classification of all such geodesics with energies E/m ≤ 1 for the Schwarzschild and Kerr black holes. Collisions of particles moving along the “white hole” geodesics with those moving along “black hole” geodesics are considered. Formulas for the increase in the energy of collision in the centre of mass frame are obtained, and the possibility of observation of high energy particles arriving from a black hole on the Earth is discussed.
45 citations
Cited by
More filters
Journal Article•
TL;DR: The first direct detection of gravitational waves and the first observation of a binary black hole merger were reported in this paper, with a false alarm rate estimated to be less than 1 event per 203,000 years, equivalent to a significance greater than 5.1σ.
Abstract: On September 14, 2015 at 09:50:45 UTC the two detectors of the Laser Interferometer Gravitational-Wave Observatory simultaneously observed a transient gravitational-wave signal. The signal sweeps upwards in frequency from 35 to 250 Hz with a peak gravitational-wave strain of 1.0×10(-21). It matches the waveform predicted by general relativity for the inspiral and merger of a pair of black holes and the ringdown of the resulting single black hole. The signal was observed with a matched-filter signal-to-noise ratio of 24 and a false alarm rate estimated to be less than 1 event per 203,000 years, equivalent to a significance greater than 5.1σ. The source lies at a luminosity distance of 410(-180)(+160) Mpc corresponding to a redshift z=0.09(-0.04)(+0.03). In the source frame, the initial black hole masses are 36(-4)(+5)M⊙ and 29(-4)(+4)M⊙, and the final black hole mass is 62(-4)(+4)M⊙, with 3.0(-0.5)(+0.5)M⊙c(2) radiated in gravitational waves. All uncertainties define 90% credible intervals. These observations demonstrate the existence of binary stellar-mass black hole systems. This is the first direct detection of gravitational waves and the first observation of a binary black hole merger.
4,375 citations
01 Dec 1982
1,915 citations
TL;DR: In this paper, the authors provide a review of both new experimental and theoretical developments in the Casimir effect, and provide the most recent constraints on the corrections to Newtonian gravitational law and other hypothetical long-range interactions at submillimeter range.
1,388 citations
TL;DR: In this article, a method for producing a nanoporous carbide-derived carbon composition with a tunable pore structure and a narrow pore size is presented. But the method is not suitable for the use of nanoporous carbon.
Abstract: The present invention provides a method for producing a nanoporous carbide-derived carbon composition with a tunable pore structure and a narrow pore size. Also provided are compositions prepared by the method.
629 citations
TL;DR: In this article, the authors review recent experimental tests of the gravitational inverse square law and a wide variety of theoretical considerations that suggest the law may break down in experimentally accessible regions.
Abstract: ▪ Abstract We review recent experimental tests of the gravitational inverse-square law and the wide variety of theoretical considerations that suggest the law may break down in experimentally accessible regions.
629 citations