Deriving the radial-velocity variations induced by stellar activity from high-precision photometry - Test on HD 189733 with simultaneous MOST/SOPHIE dataA. F. Lanza, I. Boisse, F. Bouchy, A. S. Bonomo and C. MoutouA&A, 533 (2011) A44DOI: https://doi.org/10.1051/0004-6361/201117270