Ejection of close-in super-Earths around low-mass stars in the giant impact stage Yuji Matsumoto, Pin-Gao Gu, Eiichiro Kokubo, Shoichi Oshino and Masashi Omiya A&A, 642 (2020) A23 Published online: 30 September 2020 DOI: 10.1051/0004-6361/202038332