A possible architecture of the planetary system HR 8799 M. Reidemeister, A. V. Krivov, T. O. B. Schmidt, S. Fiedler, S. Müller, T. Löhne and R. Neuhäuser A&A, 503 1 (2009) 247-258 Published online: 02 July 2009 DOI: 10.1051/0004-6361/200912055