2014/11/30 by Hossein Ghaffarnejad, H. Niad, Hassan Niad
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black hole (networking) #Charge (physics) #Cosmology and Gravitation Theories #Dimensionless quantity #Galaxy #Geometry #Gravitation #Gravitational lens #Gravitational singularity #Mathematical physics #Naked singularity #Photon #Physics #Pulsars and Gravitational Waves Research #Quantum mechanics #Scalar (mathematics) #Strong gravitational lensing #astro-ph.GA #gr-qc #hep-th
paper · pdf · doi:10.1007/s10773-015-2787-8
published as International Journal Of Theoretical Physics (2015) · 20 pages, 7 figures with some revisions
arxiv created 2015/09/04 · arxiv updated 2015/09/07 · openalex publication_date 2015/09/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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=(g)/(2m) we seek to disappear photon sphere in the case of |q|>24√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).