Spectroscopic observations of the δ Scorpii binary during its recent periastron passage A. S. Miroshnichenko, J. Fabregat, K. S. Bjorkman, D. C. Knauth, N. D. Morrison, A. E. Tarasov, P. Reig, I. Negueruela and P. Blay A&A, 377 2 (2001) 485-495 Published online: 15 October 2001 DOI: 10.1051/0004-6361:20010911