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Fig. 11
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Equilibrium value 
(left) and libration half-width δQ1... δQ4 (right) vs. mass of S1 - m1 (in units of the mass of Io) for different α (left column). Top row: 2:1&3:2 resonance. Bottom row: 3:2&3:2 resonance. The reference values for the actual Galilean system are indicated by dashed lines.
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