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Paper   IPM / Astronomy / 14792
School of Astronomy
  Title:   Charged cosmological black hole
1.  Rahim. Moradi
2.  Clément . Stahl
3.  Javad. Firouzjaee
4.  She-Sheng. Xue
  Status:   Submitted
  Journal: Phys. Rev. D
  Vol.:  96
  Year:  2017
  Supported by:            ipm IPM
The cosmological black holes are black holes living not in an asymptotically flat universe but in an expanding spacetime. They have a rich dynamics in particular for their mass and horizon. In this article we perform a natural step in investigating this new type of black hole: we consider the possibility of a charged cosmological black hole. We derive the general equations of motion governing its dynamics and report a new analytic solution for the special case of the charged Lemaître-Tolman-Bondi equations of motion that describe a charged cosmological black hole. We then study various relevant quantities for the characterization of the black hole such as the C-function, the effect of the charge on the black hole flux and the nature of the singularity. We also perform numerical investigations to strengthen our results. Finally we challenge a model of gamma ray burst within our framework

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