Spectral and spatial imaging of the Be+sdO binary ϕ Persei D. Mourard, J. D. Monnier, A. Meilland, D. Gies, F. Millour, M. Benisty, X. Che, E. D. Grundstrom, R. Ligi, G. Schaefer et al. (18 more) A&A, 577 (2015) A51 Published online: 30 April 2015 DOI: 10.1051/0004-6361/201425141