PO and PN in the wind of the oxygen-rich AGB star IK Tauri E. De Beck, T. Kamiński, N. A. Patel, K. H. Young, C. A. Gottlieb, K. M. Menten and L. Decin A&A, 558 (2013) A132 Published online: 17 October 2013 DOI: 10.1051/0004-6361/201321349