Particles collision near Kerr–Sen Dilaton-Axion black hole

Debnath, Ujjal

doi:10.1142/s0217732320500339

Cited by 7 publications

(2 citation statements)

References 60 publications

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“…Another case which has been extensively investigated is is the so-called Kerr-Sen black hole [20][21][22]. Because in this case the timelike geodesics are also integrable, it has also been the subject of studies of the Banados-Silk-West (BSW) [23] effect [24,25].…”

Section: Introductionmentioning

confidence: 99%

STU black holes and SgrA^⋆

Cvetič

Gibbons

Pope

2017

J. Cosmol. Astropart. Phys.

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The equations of null geodesics in the STU family of rotating black hole solutions of supergravity theory, which may be considered as deformations of the vacuum Kerr metric, are completely integrable. We propose that they be used as a foil to test, for example, with what precision the gravitational field external to the black hole at the centre of our galaxy is given by the Kerr metric.By contrast with some metrics proposed in the literature, the STU metrics satisfy by construction the dominant and strong energy conditions. Our considerations may be extended to include the effects of a cosmological term. We show that these metrics permit a straightforward calculation of the properties of black hole shadows.

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Section: Introductionmentioning

confidence: 99%

STU black holes and SgrA^⋆

Cvetič

Gibbons

Pope

2017

J. Cosmol. Astropart. Phys.

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“…Higher-dimensional black holes have been studied, for instance, in Refs. [28][29][30], lower-dimensional black holes in Refs. [31,35,36,[44][45][46], as well as stringy black holes [37].…”

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confidence: 99%

Motion and collision of particles in a rotating linear dilaton black hole

et al. 2018

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We study the motion of particles in the background of a four-dimensional linear dilaton black hole. We solve analytically the equations of motion of the test particles and we describe their motion. We show that the dilaton black hole acts as a particle accelerator by analyzing the energy in the center of mass (CM) frame of two colliding particles in the vicinity of its horizon. In particular we find that there is a critical value of the angular momentum, which depends on the string coupling, and a particle with this critical angular momentum can reach the inner horizon with an arbitrarily high CM energy. This is known as the Bañados, Silk and West (BSW) process. We also show that the motion and collisions of particles have a similar behavior to the three-dimensional BTZ black hole. In fact, the photons can plunge into the horizon or escape to infinity, and they can not be deflected, while for massive particles there are no confined orbits of first kind, like planetary or circular orbits.

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