A CO funnel in the Galactic centre: Molecular counterpart of the northern Galactic chimney V. S. Veena, D. Riquelme, W.-J. Kim, K. M. Menten, P. Schilke, M. C. Sormani, W. E. Banda-Barragán, F. Wyrowski, G. A. Fuller and A. Cheema A&A, 674 (2023) L15 Published online: 27 June 2023 DOI: 10.1051/0004-6361/202346702