Modeling the black holes surrounded by a dark matter halo in the galactic center of M87 Dong Liu, Yi Yang, Zhaoyi Xu and Zheng-Wen Long Eur. Phys. J. C, 84 2 (2024) 136 Published online: 08 February 2024 DOI: 10.1140/epjc/s10052-024-12492-4