Implications of the mild gas motion found with Hitomi in the core of the Perseus cluster Liyi Gu, Kazuo Makishima, Ryoji Matsumoto, Kazuhiro Nakazawa, Kazuhiro Shimasaku, Naohisa Inada, Tadayuki Kodama, Haiguang Xu and Madoka Kawaharada A&A, 638 (2020) A138 Published online: 26 June 2020 DOI: 10.1051/0004-6361/201936437