The extreme O-type spectroscopic binary HD 93129A - A quantitative, multiwavelength analysis D. Gruner, R. Hainich, A. A. C. Sander, T. Shenar, H. Todt, L. M. Oskinova, V. Ramachandran, T. Ayres and W.-R. Hamann A&A, 621 (2019) A63 Published online: 08 January 2019 DOI: 10.1051/0004-6361/201833178