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gr-qc2026
Photon rings and shadows of black holes with non-minimal couplings between curvature and electromagnetic field
Zhixiang Yin, Changjun Gao, Yun-Long Zhang
We investigate black holes with non-minimal couplings between the electromagnetic field and spacetime curvature tensors, focusing on their event horizons, shadows, and photon rings…
gr-qc2016★ 27 cited
Horizon supertranslation and degenerate black hole solutions
Rong-Gen Cai, Shan-Ming Ruan, Yun-Long Zhang
In this note we first review the degenerate vacua arising from the BMS symmetries. According to the discussion in [1] one can define BMS-analogous supertranslation and superrotatio…