1 Ocak 2017 Dergi makalesi Açık Erişim

Azreg-Aïnou, Mustapha; Bahamonde, Sebastian; Jamil, Mubasher

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    <subfield code="u">Department of Mathematics, University College London, 0000000121901201, Gower Street, WC1E 6BT, London, UK</subfield>
    <subfield code="a">Bahamonde, Sebastian</subfield>
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    <subfield code="u">Department of Mathematics, School of Natural Sciences (SNS), National University of Sciences and Technology (NUST), 0000 0001 2234 2376, H-12, Islamabad, Pakistan</subfield>
    <subfield code="a">Jamil, Mubasher</subfield>
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    <subfield code="a">&lt;p&gt;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 derived. The resulting trajectory equation is solved analytically via perturbation and series methods for a special choice of parameters, and the distance of the closest approach to black hole is calculated. We also derive the lens equation giving the bending angle of light in the curved background. In the strong field approximation, the solution of the lens equation is also obtained for all values of the quintessence parameter wq . For all wq , we show that there are no stable closed null orbits and that corrections to the deflection angle for the Reissner–Nordström black hole when the observer and the source are at large, but finite, distances from the lens do not depend on the charge up to the inverse of the distances squared. A part of the present work, analyzed, however, with a different approach, is the extension of Younas et al. (Phys Rev D 92:084042, 2015 ) where the uncharged case has been treated.&lt;/p&gt;</subfield>
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