Accretion vs. colliding wind models for the gamma-ray binary LS I +61 303: an assessment G. E. Romero, A. T. Okazaki, M. Orellana and S. P. Owocki A&A, 474 1 (2007) 15-22 Published online: 13 August 2007 DOI: 10.1051/0004-6361:20078035