Constraints on charged black hole parameters using quasiperiodic oscillations data

Javlon Rayimbaev*, Bobomurat Ahmedov, Ashfaque H. Bokhari

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Testing gravity theories and constraining their parameters using data from astrophysical observations of quasiperiodic oscillations (QPOs) is a powerful approach to study the features of black holes (BHs) and gravity theories in the strong field regime. To this end, we investigate the dynamics of the test particles in the vicinity of some charged BHs such as Reissner-Nordström (RN), regular Bardeen and Ayon-Beato-Garcia (ABG). In particular, we calculate harmonic oscillations and the innermost stable circular orbits (ISCOs) of test particles around these BHs. As an astrophysical application, we discuss the twin peak QPOs in relativistic precession (RP) model and give the possible values of the upper and lower frequencies of the QPOs at the distance from ISCO to infinity around the extremely charged BHs. Moreover, we also investigate the position of the orbit, where twin peak QPO may take place around central (charged) BH in the microquasar GRS 1915-105. We also study the dependence of the distance between the QPO position and ISCO from the BH charge. Using the upper and lower frequencies of the QPO, we obtain the relationship between the mass and charge of the central BH in the microquasar. Finally, we compare the effects of the spin of the Kerr BH and BH charges on the QPO in microquasar GRS 1915-105. We find that the BH charge can mimic the spin up to a/M = 0.2927 in the Bardeen model and up to a/M = 0.7687 in the case of special regular BH, admitting the same QPO frequencies.

Original languageEnglish
Article number2240004
JournalInternational Journal of Modern Physics D
Issue number11
StatePublished - 1 Aug 2022

Bibliographical note

Funding Information:
A. H. B. at KFUPM and B. A. would like to acknowledge the support received from KFUPM under the University Funded Grant SB191039.

Publisher Copyright:
© 2022 World Scientific Publishing Company.


  • Charged black holes
  • microquasars
  • quasiperiodic oscillations

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


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