Quasinormal modes and greybody factors of f(R) gravity minimally coupled to a cloud of strings in 2+1 dimensions

Ali Övgün, Kimet Jusufi

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

In this paper we have studied the propagation of a massless scalar field minimally coupled to a black hole with the source of cloud of strings in 2+1f(R) gravity theory. In particular we have found analytical results for the decay rate, reflection coefficient, greybody factors, as well as the black hole temperature. On the other hand, our quasinormal modes analyses reveal stability in the propagation of a massless scalar field in the cloud of strings black hole spacetime. However, under a suitable choose of parameters an instability is found. Furthermore based on the Bekenstein conjecture on the quantization of the surface area of the black hole we find the minimal surface area associated to the black hole horizon which is in agreement with Bekenstein's proposal.

Original languageEnglish
Pages (from-to)138-151
Number of pages14
JournalAnnals of Physics
Volume395
DOIs
StatePublished - Aug 2018
Externally publishedYes

Keywords

  • Classical fields
  • Cloud of strings black holes
  • Greybody factors
  • Quasinormal modes

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