Europlanet Science Congress 2021
Virtual meeting
13 – 24 September 2021
Europlanet Science Congress 2021
Virtual meeting
13 September – 24 September 2021
EPSC Abstracts
Vol. 15, EPSC2021-65, 2021
https://doi.org/10.5194/epsc2021-65
European Planetary Science Congress 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Venus internal structure and global deformation

Christelle Saliby1, Agnes Fienga1, Giorgio Spada2, Daniele Melini3, and Anthony Memin1
Christelle Saliby et al.
  • 1Géoazur, Université Cote d'Azur, Observatoire de la côte d'azur, Valbonne, France
  • 2University di Bologna, Dipartimento di Fisica e Astronomia "Augusto Righi”, Bologna, Italy
  • 3Istituto Nazionale di Geofisica e Vulcanologia, Rome, Italy

Tidal forces acting on a planet cause a deformation and mass redistribution in its interior, involving surface motions and variation in the gravity field, which may be observed in geodetic experiments. The change in the gravitational field of the planet, due to the influence of an external gravity field, described primarily by its tidal Love number k of degree 2 (denoted by k2) can be observed from analysis of a spacecraft radio tracking. The planet’s deformation is linked to its internal structure, most effectively to its density and rigidity. Hence the tidal Love number k2 can be theoretically approximated for different planetary models, which means comparing the observed and theoretical calculation of k2 of a planet is a window to its internal structure.

The terrestrial planet Venus is reminiscent of the Earth twin planet in size and density, which leads to the assumption that the Earth and Venus have similar internal structures. In this work, with a Venus we investigate the structure and elastic parameters of the planet’s major layers to calculate its frequency dependent tidal Love number k2. The calculation of k2 is done with ALMA, a Fortran 90 program by Spada [2008] for computing the tidal and load Love numbers using the Post-Widder Laplace inversion formula. We test the effect of different parameters in the Venus model (as a layer’s density, rigidity, viscosity and thickness) on the tidal Love numbers k2 and different linear and non-linear combinations of k2 andh2 (as the tidal Love number h2 describes the radial displacement due to tidal effects).

How to cite: Saliby, C., Fienga, A., Spada, G., Melini, D., and Memin, A.: Venus internal structure and global deformation, European Planetary Science Congress 2021, online, 13–24 Sep 2021, EPSC2021-65, https://doi.org/10.5194/epsc2021-65, 2021.

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