Edge collapse and subsequent longitudinal accretion in filament S242 Lixia Yuan, Guang-Xing Li, Ming Zhu, Tie Liu, Ke Wang, Xunchuan Liu, Kee-Tae Kim, Ken’ichi Tatematsu, Jinghua Yuan and Yuefang Wu A&A, 637 (2020) A67 Published online: 15 May 2020 DOI: 10.1051/0004-6361/201936625