TL;DR
This paper investigates gravitational lensing effects caused by STU black holes, focusing on how black hole charge influences the deflection angle in extremal cases.
Contribution
It provides new calculations of deflection angles for extremal zero- and one-charged STU black holes, highlighting the impact of charge on lensing.
Findings
Black hole charge increases the deflection angle.
Deflection angles computed for extremal zero- and one-charged cases.
Results enhance understanding of gravitational lensing in charged black holes.
Abstract
In this paper we study gravitational lensing by STU black holes. We considered extremal limit of two special cases of zero-charged and one-charged black holes, and obtain the deflection angle. We find that the black hole charge increases the deflection angle.
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