Slowly rotating Bose Einstein condensate galactic dark matter halos, and their rotation curves Xiaoyue Zhang, Man Ho Chan, Tiberiu Harko, Shi-Dong Liang and Chun Sing Leung Eur. Phys. J. C, 78 4 (2018) 346 Published online: 28 April 2018 DOI: 10.1140/epjc/s10052-018-5835-8