Titan's internal structure inferred from a coupled thermal-orbital model

@article{Tobie2005TitansIS,
  title={Titan's internal structure inferred from a coupled thermal-orbital model},
  author={Gabriel Tobie and Olivier Grasset and Jonathan I. Lunine and Antoine Mocquet and Christophe Sotin},
  journal={Icarus},
  year={2005},
  volume={175},
  pages={496-502}
}
Through coupled thermal and orbital calculations including a full description of tidal dissipation, heat transfer and the H 2O–NH3 phase diagram, we propose a model for the internal structure and composition of Titan testable with Cassini–Huygens measurements. The high value of Titan’s orbital eccentricity provides a strong constraint on the amount of the tidal energy dissipation on its surface and within its interior since its formation. We show that only models with a few percent of ammonia… 

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References

SHOWING 1-10 OF 59 REFERENCES
Interior structure models and tidal Love numbers of Titan
[1] Interior models of a differentiated Titan with an internal ammonia-water ocean and chondritic radiogenic heat production in an undifferentiated rock + iron core have been calculated. We assume
On the internal structure and dynamics of Titan
Abstract The purpose of this paper is to study the evolution of Titan from the primordial core overturn to the present, and to investigate the possible existence of both a deep liquid layer and an
The Cooling Rate of a Liquid Shell in Titan's Interior
Models describing the evolution of the primordial liquid layer in Titan's interior are presented using parameterized models. These models incorporate recent experimental data on the ammonia water
Tidal Dissipation on Titan
Abstract Tidal dissipation may constrain the nature of the surface and interior of Titan. Provided the surface of Titan is covered by satellite-wide hydrocarbon seas and oceans, the solid body of
Internal structure and dynamics of the large icy satellites
Abstract The magnetic data returned by the Galileo mission suggest that deep oceans are present within the icy Galilean satellites. In addition, tectonic features on Europa are consistent with models
Thermal convection in the outer shell of large icy satellites
Evolution of large icy satellites is controlled by heat transfer across the outer ice I layer. After the core overturn a possible structure consists of a silicate core and a shell of molten ices. As
Tidally heated convection: Constraints on Europa's ice shell thickness
[1] The thickness of Europa's ice shell is constrained with numerical experiments of thermal convection, including heterogeneous tidal heating. Thermal convection occurs in the stagnant lid regime
Oceans in the icy Galilean satellites of Jupiter
Abstract Equilibrium models of heat transfer by heat conduction and thermal convection show that the three satellites of Jupiter—Europa, Ganymede, and Callisto—may have internal oceans underneath ice
Thermal evolution of a differentiated Ganymede and implications for surface features
Thermal evolution models are presented for Ganymede, assuming a mostly differentiated initial state of a water ocean overlying a rock layer. The only heat sources are assumed to be primordial heat
Tidal effects of disconnected hydrocarbon seas on Titan
TLDR
It is argued that a more realistic topography, in which liquid hydrocarbons are confined to a number of disconnected seas or crater lakes, may satisfy both the dynamical and observational constraints.
...
1
2
3
4
5
...