Discovery of a TiO emission band in the infrared spectrum of the S star NP Aurigae K. Smolders, T. Verhoelst, P. Neyskens, J. A. D. L. Blommaert, L. Decin, H. Van Winckel, S. Van Eck, G. C. Sloan, J. Cami, S. Hony et al. (3 more) A&A, 543 (2012) L2 Published online: 26 June 2012 DOI: 10.1051/0004-6361/201219520