The CoRoT target HD 49933 - I. Effect of the metal abundance on the mode excitation rates R. Samadi, H.-G. Ludwig, K. Belkacem, M. J. Goupil and M.-A. Dupret A&A, 509 (2010) A15 Published online: 12 January 2010 DOI: 10.1051/0004-6361/200911867