Detection of the [C I] λ8727 emission line - Low-ionization structures in NGC 7009 S. Akras, H. Monteiro, J. R. Walsh, L. Konstantinou, D. R. Gonçalves, J. Garcia–Rojas, P. Boumis and I. Aleman A&A, 689 (2024) A14 Published online: 27 August 2024 DOI: 10.1051/0004-6361/202450325