Email this article On the sensitivity of the chandler wobble period of Mars to the parameters of the rheological model
- Authors: Kulik E.A.1, Gudkova T.V.1
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Affiliations:
- Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences
- Issue: Vol 518, No 1 (2024)
- Pages: 166-170
- Section: GEOPHYSICS
- Submitted: 20.01.2025
- Accepted: 20.01.2025
- Published: 29.11.2024
- URL: https://journal-vniispk.ru/2686-7397/article/view/277489
- DOI: https://doi.org/10.31857/S2686739724090161
- ID: 277489
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Abstract
The Chandler period of Mars is a new parameter determined from observational data that characterizes the properties of the planet’s interior. Numerical modeling of the period of the Chandler wobble of Mars was performed for a number of internal structure models that satisfy not only geodetic data (moment of inertia, tidal Love number k2), but also data obtained during a seismic experiment in 2019–2022. To reconcile the theoretical and observed values of the Chandler wobble, it is necessary to take into account the inelasticity of the mantle. To take into account the viscoelastic behavior of the interiors, the Andrade rheological model was used. It is demonstrated how the value of the Chandler period depends on the parameters of the rheological model.
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About the authors
E. A. Kulik
Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Email: kulik.ea@ifz.ru
Russian Federation, Moscow
T. V. Gudkova
Sсhmidt Institute of Physics of the Earth of the Russian Academy of Sciences
Author for correspondence.
Email: gudkova@ifz.ru
Russian Federation, Moscow
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Supplementary files
Supplementary Files
Action
1.
JATS XML
2.
Fig. 1. Dependence of the Love number k2 on the viscosity of the layer at the base of the mantle.
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3.
Fig. 2. Deviation of the real part of the Love number k2 from the elastic value depending on the value of the Andrade parameter α for the test multilayer inelastic model (in the crust the viscosity is taken to be η0, in the olivine mantle 10–2η0, in the β layer ‒ 10–1η0, in the γ layer — η0): η0=1021 Pa s (white circles), η0=1022 Pa s (black circles), η0=1023 Pa s (black squares).
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4.
Fig. 3. Chandler period of Mars for different values of viscosity and Andrade parameter α. The numbers in the figure correspond to the power of the viscosity parameter η0.
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