119 citations · 266 across the 15 of their papers we have counts for
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gr-qc2021★ 1 cited
Einstein-Maxwell-dilaton neutral black holes in strong magnetic fields: topological charge, shadows and lensing
Haroldo C. D. Lima Junior, Jian-Zhi Yang, Luís C. B. Crispino +2
The light rings (LRs) topological charge (TC) of a spacetime measures the number of stable LRs minus the number of unstable LRs. It is invariant under smooth spacetime deformations…
gr-qc2021★ 119 cited
Can different black holes cast the same shadow?
Haroldo C. D. Lima Junior, Luís C. B. Crispino, Pedro V. P. Cunha +1
We consider the following question: may two different black holes (BHs) cast exactly the same shadow? In spherical symmetry, we show the necessary and sufficient condition for a st…