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Conference papers

Thickness of the crust of Mercury from geoid-to-topography ratios

Abstract : From the gravity and topography fields of Mercury determined by the MESSENGER spacecraft, we calculate geoid-to-topography ratios (GTRs) as a means to constrain the average thickness of Mercury's crust. We assume Airy isostasy and exclude regions that might not satisfy this assumption, such as smooth plains and large impact basins. We limit our analysis to spherical harmonic degree n ≥ 5, since lower degrees might be affected by other processes. In the analyzed regions we find that the GTR is 20±4 m/km (1-σ). For an assumed crustal density of 2900 kg m-3, we infer an average crustal thickness of 79±20 km.
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Submitted on : Saturday, February 19, 2022 - 10:44:30 AM
Last modification on : Monday, February 21, 2022 - 3:28:13 AM
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S. Padovan, M. A. Wieczorek, J. -L. Margot, S. C. Solomon. Thickness of the crust of Mercury from geoid-to-topography ratios. European Planetary Science Congress 2014, 0000, à renseigner, Unknown Region. pp. 1441-1451. ⟨insu-03581137⟩



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