“School of Particles And Accelerator”

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Paper   IPM / Particles And Accelerator / 18330
School of Particles and Accelerator
  Title:   Analytically approximation solution to $R^2$ gravity
  Author(s): 
1.  S. N Sajadi
2.  Ali Hajilou
3.  S. H Hendi
  Status:   Published
  Journal: Eur. Phys. J. C
  Vol.:  83
  Year:  2023
  Supported by:  IPM
  Abstract:
In this paper, we obtain analytical approximate black hole solutions in the framework of f(R) gravity and the absence of a cosmological constant. In this area, we apply the equations of motion of the theory to a spherically symmetric spacetime with one unknown function and derive black hole solutions without any constraints on the Ricci scalar. To do so, first, we obtain the near horizon and asymptotic solutions and then use both of them to obtain a complete solution by utilizing a continued-fraction expansion. Finally, we investigate the stability of the solutions by employing the thermodynamics and quasi-normal modes.

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