Production of linear alkanes via the solid-state hydrogenation of interstellar polyynes G. Fedoseev, X. Li, G. A. Baratta, M. E. Palumbo and K.-J. Chuang A&A, 693 (2025) A277 Published online: 23 January 2025 DOI: 10.1051/0004-6361/202452210