Black-Hole Phenomenology

Bilić, Neven

doi:10.22323/1.034.0004

Cited by 4 publications

(4 citation statements)

References 109 publications

(202 reference statements)

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“…which corresponds to the value of E/µ at which the (radial) kinetic energy of the particle vanishes [1,[31][32][33], i.e. it is the value at which r is a "turning point" (V = E/µ).…”

Section: Reissner-nordström Spacetime and Circularly Orbiting Charged...mentioning

confidence: 99%

General classification of charged test particle circular orbits in Reissner–Nordström spacetime

2017

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We investigate charged particles' circular motion in the gravitational field of a charged mass distribution described by the Reissner-Nordström spacetime. We introduce a set of independent parameters completely characterizing the different spatial regions in which circular motion is allowed. We provide a most complete classification of circular orbits for different sets of particle and source chargeto-mass ratios. We study both black holes and naked singularities and show that the behavior of charged particles depend drastically on the type of source. Our analysis shows in an alternative manner that the behavior of circular orbits can in principle be used to distinguish between black holes and naked singularities. From this analysis, special limiting values for the dimensionless charge of black hole and naked singularity emerge, namely, Q/M = 1/2, Q/M = √ 13/5 and Q/M = √ 2/3 for the black hole case and Q/M = 1, Q/M = 5/(2 √ 6), Q/M = 3 √ 6/7, and finally Q/M = √ 9/8 for the naked singularity case. Similarly and surprisingly, analogous limits emerge for the orbiting particles charge-to-mass ratio , for positive charges = 1, = 2 and = M/Q. These limits play an important role in the study of the coupled electromagnetic and gravitational interactions, and the investigation of the role of the charge in the gravitational collapse of compact objects.

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“…which corresponds to the value of E/µ at which the (radial) kinetic energy of the particle vanishes [1,[31][32][33], i.e. it is the value at which r is a "turning point" (V = E/µ).…”

Section: Reissner-nordström Spacetime and Circularly Orbiting Charged...mentioning

confidence: 99%

General classification of charged test particle circular orbits in Reissner–Nordström spacetime

2017

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“…as the value of E/µ that makes r into a "turning point" (V = E/µ); in other words, the value of E/µ at which the (radial) kinetic energy of the particle vanishes [1][2][3][4]. The effective potential with positive (negative) sign corresponds to the solution with…”

Section: Introductionmentioning

confidence: 99%

Motion of charged test particles in Reissner-Nordström spacetime

2011

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We investigate the circular motion of charged test particles in the gravitational field of a charged mass described by the Reissner-Nordström (RN) spacetime. We study in detail all the spatial regions where circular motion is allowed around either black holes or naked singularities. The effects of repulsive gravity are discussed by finding all the circles at which a particle can have vanishing angular momentum. We show that the geometric structure of stable accretion disks, made of only test particles moving along circular orbits around the central body, allows us to clearly distinguish between black holes and naked singularities.

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“…A naked singularity is forbidden by the so called cosmic censor conjecture. A black hole with |a| = M is called a maximally rotating black hole (for instance, see Bilac' 2008), where ρ is given by the root of,…”

Section: Newtonian and Relativistic Energiesmentioning

confidence: 99%