Inferring Io’s interior from tidal monitoring

Kervazo, Mathilde; Tobie, G.; Choblet, G.; Dumoulin, Caroline; Běhounková, M.

doi:10.1016/j.icarus.2021.114737

Cited by 13 publications

(11 citation statements)

References 74 publications

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“…The amplitude of Io's tidal deformation is strongly related to the rheological properties of Io's interior and to the degree of melting (Kervazo et al 2022). Calculation of the distribution of tidal heating between the mantle and the asthenosphere is highly sensitive to the assumed melt fraction in the asthenosphere to the extent that for a melt fraction smaller than a critical value that corresponds to a transition from a soliddominated behavior to that of a liquid-dominated one, dissipation is confined mostly to the mantle (Kervazo et al 2022). As described above, tidal heating in the deep mantle results in polar regions that are preferentially heated, and tidal heating in the asthenosphere results in equatorial regions that are preferentially heated.…”

Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

“…As described above, tidal heating in the deep mantle results in polar regions that are preferentially heated, and tidal heating in the asthenosphere results in equatorial regions that are preferentially heated. If the partial melt fraction in the asthenosphere is larger than ∼30%, dissipation associated with volume changes modifies the surface tidal heating pattern, but equatorial regions remain preferentially heated (Kervazo et al 2022;Matsuyama et al 2022).…”

Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

“…The observed pole-to-pole thermal emission is consistent with a dissipation of about 75% in the asthenosphere and the rest in the deep mantle, which is broadly consistent with previous modeling (e.g., Tackley 2001;Hamilton et al 2013), which suggested a partition of two-thirds shallow heating, one-third deep heating. Applying the model of Kervazo et al (2022), this partitioning of heating location would imply a silicate viscosity for the deep mantle of the order of 10 19 Pa s and a melt fraction of about 20%-30% in a 50-100 km thick asthenosphere.…”

Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

See 2 more Smart Citations

New Global Map of Io’s Volcanic Thermal Emission and Discovery of Hemispherical Dichotomies

Davies,

Perry,

Williams

et al. 2024

Planet. Sci. J.

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By combining multiple spacecraft and telescope data sets, the first fully global volcanic heat flow map of Io has been created, incorporating data down to spatial resolutions of ∼10 km pixel−1 in Io’s polar regions. Juno Jovian Infrared Auroral Mapper data have filled coverage gaps in Io’s polar regions and other areas poorly imaged by Galileo instruments. A total of 343 thermal sources are identified in data up to mid-2023. While poor correlations are found between the longitudinal distribution of volcanic thermal emission and radially integrated end-member models of internal heating, the best correlations are found with shallow asthenospheric tidal heating and magma ocean models and negative correlations with the deep-mantle heating model. The presence of polar volcanoes supports, but does not necessarily confirm, the presence of a magma ocean on Io. We find that the number of active volcanoes per unit area in polar regions is no different from that at lower latitudes, but we find that Io’s polar volcanoes are smaller, in terms of thermal emission, than those at lower latitudes. Half as much energy is emitted from polar volcanoes as from those at lower latitudes, and the thermal emission from the north polar cap volcanoes is twice that of those in the south polar cap. Apparent dichotomies in terms of volcanic advection and resulting power output exist between sub- and anti-Jovian hemispheres, between polar regions and lower latitudes, and between the north and south polar regions, possibly due to internal asymmetries or variations in lithospheric thickness.

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Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

Section: Correlation With Heat Flow Modelsmentioning

confidence: 99%

See 1 more Smart Citation

New Global Map of Io’s Volcanic Thermal Emission and Discovery of Hemispherical Dichotomies

Davies,

Perry,

Williams

et al. 2024

Planet. Sci. J.

View full text Add to dashboard Cite

show abstract

“…However, the value of C for the satellite is uncertain. Theoretical prediction shows that the value of C should be lower than 0.06 for high density satellite core (Kervazo et al 2022). We adopt the value revealed from the observational data of the Jupiter's moon Io C ≈ 0.02 (Lainey et al 2009).…”

Section: The Tidal Heating Modelmentioning

confidence: 99%

What if planet 9 has satellites?

Chan¹

2023

Preprint

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In the past decade, numerical simulations started to reveal the possible existence of planet 9 in our solar system. The planet 9 scenario can provide an excellent explanation to the clustering in orbital elements for Kuiper Belt objects. However, no optical counterpart has been observed so far to verify the planet 9 scenario. Therefore, some recent studies suggest that planet 9 could be a dark object, such as a primordial black hole. In this article, we show that the probability of capturing large trans-Neptunian objects (TNOs) by planet 9 to form a satellite system in the scattered disk region (between the inner Oort cloud and Kuiper Belt) is large. By adopting a benchmark model of planet 9, we show that the tidal effect can heat up the satellites significantly, which can give sufficient thermal radio flux for observations, even if planet 9 is a dark object. This provides a new indirect way for examining the planet 9 hypothesis and revealing the basic properties of planet 9.

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“…However, the value of C for the satellite is uncertain. Theoretical prediction shows that the value of C should be lower than 0.06 for the high-density satellite core (Kervazo et al 2022). We adopt the value revealed from the observational data of Jupiterʼs moon Io, C ≈ 0.02 (Lainey et al 2009).…”

Section: The Tidal Heating Modelmentioning

confidence: 99%

What If Planet Nine Has Satellites?

Chan

2023

ApJ

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In the past decade, numerical simulations started to reveal the possible existence of Planet Nine in our solar system. The Planet Nine scenario can provide an excellent explanation for the clustering in orbital elements for Kuiper Belt objects. However, no optical counterpart has been observed so far to verify the Planet Nine scenario. Therefore, some recent studies suggest that Planet Nine could be a dark object, such as a primordial black hole. In this article, we show that the probability of capturing large trans-Neptunian objects by Planet Nine to form a satellite system in the scattered disk region (between the inner Oort Clouds and the Kuiper Belt) is large. By adopting a benchmark model of Planet Nine, we show that the tidal effect can heat up the satellites significantly, which can give sufficient thermal radio flux for observations, even if Planet Nine is a dark object. This provides a new, indirect way for examining the Planet Nine hypothesis and revealing the basic properties of Planet Nine.

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Inferring Io’s interior from tidal monitoring

Cited by 13 publications

References 74 publications

New Global Map of Io’s Volcanic Thermal Emission and Discovery of Hemispherical Dichotomies

New Global Map of Io’s Volcanic Thermal Emission and Discovery of Hemispherical Dichotomies

What if planet 9 has satellites?

What If Planet Nine Has Satellites?

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