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Weak Gravitational Lensing from Regular Bardeen Black Holes

International Journal of Theoretical Physics volume 55, pages 1492–1505 (2016)Cite this article

Abstract

In this article we study weak gravitational lensing of regular Bardeen black hole which has scalar charge g and mass m. We investigate the angular position and magnification of non-relativistic images in two cases depending on the presence or absence of photon sphere. Defining dimensionless charge parameter \(q=\frac {g}{2m}\) we seek to disappear photon sphere in the case of \(|q|>{24\sqrt 5}/{125}\) for which the space time metric encounters strongly with naked singularities. We specify the basic parameters of lensing in terms of scalar charge by using the perturbative method and found that the parity of images is different in two cases: (a) The strongly naked singularities is present in the space time. (b) singularity of space time is weak or is eliminated (the black hole lens).

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Authors and Affiliations

  1. Department of Physics, Semnan University, P.O. Box 35131-19111, Semnan, Iran

    Hossein Ghaffarnejad & Hassan niad

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  1. Hossein Ghaffarnejad
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  2. Hassan niad
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Correspondence to Hossein Ghaffarnejad.

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Ghaffarnejad, H., niad, H. Weak Gravitational Lensing from Regular Bardeen Black Holes. Int J Theor Phys 55, 1492–1505 (2016). https://doi.org/10.1007/s10773-015-2787-8

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  • DOI: https://doi.org/10.1007/s10773-015-2787-8

Keywords

  • Gravitational lensing
  • Regular Bardeen black hole
  • Einstein rings
  • Magnificationweighted- centriod
  • Image locations
  • microlensing
  • Non-relativistic images