Vliv porozity na slapovou defomaci planet a měsíců
| Název práce v češtině: | Vliv porozity na slapovou defomaci planet a měsíců |
|---|---|
| Název v anglickém jazyce: | Influence of Porosity on Tidal Deformation in Planetary Bodies |
| Klíčová slova: | slapové zahřívání|porozita|poroviskoelasticita |
| Klíčová slova anglicky: | tidal heating|porosity|poroviscoelasticity |
| Akademický rok vypsání: | 2023/2024 |
| Typ práce: | diplomová práce |
| Jazyk práce: | |
| Ústav: | Katedra geofyziky (32-KG) |
| Vedoucí / školitel: | doc. RNDr. Marie Běhounková, Ph.D. |
| Řešitel: |
| Zásady pro vypracování |
| Tidal deformation and its measurements provide an opportunity to probe planetary bodies. Moreover, the associated tidal dissipation can play a significant role in shaping planets' internal evolution. Consequently, it is important to comprehend the impact of planetary structure and rheological characteristics to correctly interpret the measurements and assess long-term thermal evolution. Present investigations primarily focus on the effects of advanced empirical rheological descriptions. However, the role of porosity on tidal deformation and heating is not well understood (Liao et al., 2020, Rovira-Navarro et al., 2022).
Understanding the influence of porosity on deformation can become particularly important for strongly tidally heated celestial bodies for which intense tidal dissipation can result in significant melting, forming substantial porosity (e.g., Walterová and Běhounková, 2020). Similarly, the interiors of small moons, characterized by low gravity, may be unconsolidated and porous (Roberts, 2015; Choblet et al., 2017). This thesis aims to study poroviscoelastic medium and its effect on tidal deformation and dissipation for planetary bodies in and beyond the Solar system. In the frame of the thesis, the equations describing the tidal response of the poroviscoelastic body in the frequency domain will be derived, assuming a spherically symmetric body (Rovira-Navarro et al., 2022). The numerical implementation of the method will be benchmarked with published results (Rovira-Navarro et al., 2022). |
| Seznam odborné literatury |
| Choblet, G., Tobie, G., Sotin, C., Běhounková, M., Čadek, O., Postberg, F. and O. Souček (2017). Powering prolonged hydrothermal activity inside Enceladus, Nature Astronomy 1, 841-847, https://doi.org/10.1038/s41550-017-0289-8.
Liao, Y., Nimmo, F., & Neufeld, J. A. (2020). Heat production and tidally driven fluid flow in the permeable core of Enceladus. Journal of Geophysical Research: Planets, 125, e2019JE006209. https://doi.org/10.1029/2019JE006209 Roberts, J.H. (2015). The fluffy core of Enceladus, Icarus 258, pp. 54-66. https://doi.org/10.1016/j.icarus.2015.05.033 Rovira‐Navarro, M., Katz, R.F., Liao, Y. van der Wal, W., Nimmo, F. (2022), The tides of Enceladus' porous core, Journal of Geophysical Research: Planets, 127(5), e2021JE007117. https://doi.org/10.1029/2021JE007117 Walterova, M. and Behounkova, M. (2020), Thermal and orbital evolution of low-mass exoplanets, The Astrophysical Journal, 900(1), No. 24, https://doi.org/10.3847/1538-4357/aba8a5. |