Tidal Constraints on the Martian Interior

We compare several recent Martian interior models and evaluate how these are impacted by the tidal constraints provided Love number k2 secular acceleration in longitude s of its main moon, Phobos. The expression latter is developed up to harmonic degree 5 match accuracy current observations. a structure measurements parameters derive estimations possible core radius, temperature profile, attenuation interior. Our estimation radius 1,820 ± 80 km, consistent with seismic measurements. profiles at period Phobos similar between considered models, giving range for degree-2 bulk Q2 = 93.0 8.40 but diverge frequencies. At frequencies, model shear Qμ ranges 100 4,000 lower mantle, so that measurement could be used as an effective means distinguishing considered. Other such elastic lithosphere thickness Chandler Wobble favor thicker frequency dependence α 0.15 0.4. Improved on should additional radio observations from InSight mission.