The pre-main sequence spectroscopic binary AK Scorpii revisited S. H. P. Alencar, C. H. F. Melo, C. P. Dullemond, J. Andersen, C. Batalha, L. P. R. Vaz and R. D. Mathieu A&A, 409 3 (2003) 1037-1053 Published online: 17 November 2003 DOI: 10.1051/0004-6361:20031229