Now showing items 1-10 of 10

    • Astrophysical flows near f (T) gravity black holes 

      Ahmed, Ayyesha K.; Azreg-Ainou, Mustapha; Bahamonde, Sebastian; Capozziello, Salvatore; Jamil, Mubasher (2016)
      In this paper, we study the accretion process for fluids flowing near a black hole in the context of f (T) teleparallel gravity. Specifically, by performing a dynamical analysis by a Hamiltonian system, we are able to find ...
    • Cyclic and heteroclinic flows near general static spherically symmetric black holes 

      Ahmed, Ayyesha K.; Azreg-Ainou, Mustapha; Faizal, Mir; Jamil, Mubasher (2016)
      We investigate the Michel-type accretion onto a static spherically symmetric black hole. Using a Hamiltonian dynamical approach, we show that the standard method employed for tackling the accretion problem has masked some ...
    • Gyroscope precession frequency analysis of a five-dimensional charged rotating Kaluza-Klein black hole 

      Azreg-Ainou, Mustapha; Jamil, Mubasher; Lin, Kai (2020)
      We study the spin precession frequency of a test gyroscope attached to a stationary observer in the five-dimensional rotating Kaluza-Klein black hole (RKKBH). We derive the conditions under which the test gyroscope moves ...
    • Orbital mechanics and quasiperiodic oscillation resonances of black holes in Einstein-AEther theory 

      Azreg-Ainou, Mustapha; Chen, Zihang; Deng, Bojun; Jamil, Mubasher; Zhu, Tao; Wu, Qiang; Lim, Yen-Kheng (2020)
      In this paper, we study the motion of test particles around two exact charged black hole solutions in Einstein-AEther theory. Specifically, we first consider the quasiperiodic oscillations (QPOs) and their resonances ...
    • Rotating normal and phantom Einstein-Maxwell-dilaton black holes: Geodesic analysis 

      Azreg-Ninou, Mustapha; Haroon, Sumarna; Jamil, Mubasher; Rizwan, Muhammed (2019)
      Depending on five parameters, rotating counterparts of Einstein-Maxwell-dilaton black holes are derived. We discuss their physical and geometric properties and investigate their null and timelike geodesics including circular ...
    • Shadow and quasinormal modes of a rotating loop quantum black hole 

      Liu, Cheng; Zhu, Tao; Wu, Qiang; Jusufi, Kimet; Jamil, Mubasher; Azreg-Ainou, Mustapha; Wang, Anzhong (2020)
      In this paper, we construct an effective rotating loop quantum black hole (LQBH) solution, starting from the spherical symmetric LQBH by applying the Newman-Janis algorithm modified by Azreg-Ainou's noncomplexification ...
    • Shadow, quasinormal modes, and quasiperiodic oscillations of rotating Kaluza-Klein black holes 

      Ghasemi-Nodehi, M.; Azreg-Ainou, Mustapha; Jusufi, Kimet; Jamil, Mubasher (2020)
      In this paper we study the shadow of rotating Kaluza-Klein (KK) black holes and the connection between the shadow radius and the real part of quasinormal modes (QNMs) in the eiokonal limit. In addition we have explored the ...
    • Shadow, quasinormal modes, and quasiperiodic oscillations of rotating Kaluza-Klein black holes 

      Ghasemi-Nodehi, M.; Azreg-Ainou, Mustapha; Jusufi, Kimet; Jamil, Mubasher (2020)
      In this paper we study the shadow of rotating Kaluza-Klein (KK) black holes and the connection between the shadow radius and the real part of quasinormal modes (QNMs) in the eiokonal limit. In addition we have explored the ...
    • Strong gravitational lensing by a charged Kiselev black hole 

      Azreg, Ainou Mustapha; Bahamonde, Sebastian; Jamil, Mubasher (2017)
      We study the gravitational lensing scenario where the lens is a spherically symmetric charged black hole (BH) surrounded by quintessence matter. The null geodesic equations in the curved background of the black hole are ...
    • X-ray reflection spectroscopy with Kaluza-Klein black holes 

      Zhu, Jiachen; Abdikamalov, Askar B.; Ayzenberg, Dimitry; Azreg-Ainou, Mustapha; Bambi, Cosimo; Jamil, Mubasher; Nampalliwar, Sourabh; Tripathi, Ashutosh; Zhou, Menglei (2020)
      Kaluza-Klein theory is a popular alternative theory of gravity, with both non-rotating and rotating black hole solutions known. This allows for the possibility that the theory could be observationally tested. We present a ...