Spatial distributions of PN and PO in the shock region L1157-B1 B. Lefloch, C. Codella, M. Montargès, C. Vastel, L. Podio, S. Viti, I. Jimenez-Serra and C. Ceccarelli A&A, 687 (2024) A75 Published online: 01 July 2024 DOI: 10.1051/0004-6361/202245338