New sub-millimetre HCN lasers in carbon-rich evolved stars W. Yang, K. T. Wong, H. Wiesemeyer, K. M. Menten, Y. Gong, J. Cernicharo, E. De Beck, B. Klein and C. A. Durán A&A, 696 (2025) A60 Published online: 04 April 2025 DOI: 10.1051/0004-6361/202453136