A search for the cause of cyclical wind variability in O stars - Simultaneous UV and optical observations including magnetic field measurements of the O7.5III star ξ Persei
J. A. de Jong, H. F. Henrichs, L. Kaper, J. S. Nichols, K. Bjorkman, D. A. Bohlender, H. Cao, K. Gordon, G. Hill, Y. Jiang, I. Kolka, N. Morrison, J. Neff, D. O'Neal, B. Scheers and J. H. Telting
