Formation and structure of the three Neptune-mass planets system around HD 69830 Y. Alibert, I. Baraffe, W. Benz, G. Chabrier, C. Mordasini, C. Lovis, M. Mayor, F. Pepe, F. Bouchy, D. Queloz and S. Udry A&A, 455 2 (2006) L25-L28 Published online: 04 August 2006 DOI: 10.1051/0004-6361:20065697