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Fig. 2

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Complex Love number as a function of the tidal frequency for a full isentropic polytrope of index 1. Top panel: fractional correction ∆klm of the real part of the Love numbers. The fractional correction ∆k42 (orange curve in the top panel) was multiplied by 0.07. Bottom panel: minus imaginary part , which is equivalent to klm/Ql. Vertical dashed lines indicate tidal frequencies of four Galilean moons of Jupiter (from right to left: Io, Europa, Ganymede, and Callisto). The horizontal dashed line in the bottom panel represents the astrometric observation of the frequency independent k2/Q2 from Lainey et al. (2009).

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