Photon region and shadow of a rotating 5D black string Zi-Yu Tang, Xiao-Mei Kuang, Bin Wang and Wei-Liang Qian Eur. Phys. J. C, 83 9 (2023) 837 Published online: 21 September 2023 DOI: 10.1140/epjc/s10052-023-12015-7