Water vapor as a probe of the origin of gas in debris disks Yasuhiro Hasegawa, Riouhei Nakatani, Isabel Rebollido, Meredith MacGregor, Björn J. R. Davidsson, Dariusz C. Lis, Neal Turner and Karen Willacy A&A, 692 (2024) A227 Published online: 17 December 2024 DOI: 10.1051/0004-6361/202452252