The tidal response of Ganymede and Callisto with and without liquid water oceans

Moore, W. B.; Schubert, G.

doi:10.1016/j.icarus.2003.07.001

Cited by 52 publications

(34 citation statements)

References 24 publications

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“…For the case of low viscosities, it was shown for Ganymede that, in contrast to the Europa case, thermal equilibrium can only be reached for thin ice layers. Instead, equilibrium temperatures at Ganymede's surface are of the order of 126 K (Moore and Schubert , 2003), implying viscosities many orders of magnitude greater than 10 14 Pa s. We therefore may expect that the outer ice shell responds elastically to the external tidal forcing. Its response is controlled by the elastic rigidity only and is independent of the viscosity value.…”

Section: The Elastic Case Vs the Visco-elastic Casementioning

confidence: 99%

“…In order to reduce the ambiguity of the structural models, it has been proposed to measure the dynamic response of Ganymede's ice shell to tidal forces exerted by Jupiter and characterized by the body tide Love numbers h 2 and k 2 (Moore and Schubert , 2003). Similar strategies have been investigated in application to Europa (Moore and Schubert , 2000;Wu et al, 2001;Wahr et al, 2006;Hussmann et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

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Measuring tidal deformations by laser altimetry. A performance model for the Ganymede Laser Altimeter

Steinbrügge

Stark

Hußmann

et al. 2015

Planetary and Space Science

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Section: The Elastic Case Vs the Visco-elastic Casementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Measuring tidal deformations by laser altimetry. A performance model for the Ganymede Laser Altimeter

Steinbrügge

Stark

Hußmann

et al. 2015

Planetary and Space Science

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“…In this case the tidal Love numbers increase toward the fluid limit as illustrated in Fig. 5.3 coming from Moore and Schubert [76]. When the tide-raising body located at d and the perturbed body disturbed by the potential r are the same, then r coincides with d in the elastic case.…”

Section: Tidal Potentialmentioning

confidence: 80%

“…The Love number can be thus simplified as and numerical integration is required to estimate these parameters (e.g. [13,76,112] and references therein). In addition, some large satellites like Europa, Ganymede, Callisto, and Titan might hold an internal ocean beneath their surface.…”

Section: Tidal Potentialmentioning

confidence: 99%

Tides on Satellites of Giant Planets

Rambaux

Castillo‐Rogez

2013

Tides in Astronomy and Astrophysics

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The discovery of the satellites of the giant planets started in 1610 when Galileo Galilei pointed his telescope toward Jupiter. Since then observations from Earth-and space-based telescopes and outstanding in-situ observations by several space missions have revealed worlds of great richness and extreme diversity. One major source of energy driving the evolution of these satellites is the gravitational pull exerted by their planets. This force shapes and deforms the satellites and the resulting dissipation of mechanical energy can heat their interiors and drive spectacular activity, such as volcanic eruptions, as for Io or Enceladus. In addition, tides drive orbital evolution by circularizing the satellites' orbits and synchronizing their rotational motions.

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“…Europa is not unique among the four Galilean satellites, as subsurface oceans may also exist at Ganymede and Callisto [45,58,75]. But according to current models, it represents the only case in which liquid water is in contact with a silicate core.…”

Section: How Can An Icy Moon Be Habitable?mentioning

confidence: 99%

LAPLACE: A mission to Europa and the Jupiter System for ESA’s Cosmic Vision Programme

et al. 2009

Self Cite

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The exploration of the Jovian System and its fascinating satellite Europa is one of the priorities presented in ESA's "Cosmic Vision" strategic document. The Jovian System indeed displays many facets. It is a small planetary system in its own right, built-up out of the mixture of gas and icy material that was present in the external region of the solar nebula. Through a complex history of accretion, internal differentiation and dynamic interaction, a very unique satellite system formed, in which three of the four Galilean satellites are locked in the so-called Laplace resonance. The energy and angular momentum they exchange among themselves and with Jupiter contribute to various degrees to the internal heating sources of the satellites. Unique among these satellites, Europa is believed to shelter an ocean between its geodynamically active icy crust and its silicate mantle, one where the main conditions for habitability may be fulfilled. For this very reason, Europa is one of the best candidates for the search for life in our Solar System. So, is Europa really habitable, representing a "habitable zone" in the Jupiter system? To answer Exp Astron (2009) 23:849-892 851 this specific question, we need a dedicated mission to Europa. But to understand in a more generic way the habitability conditions around giant planets, we need to go beyond Europa itself and address two more general questions at the scale of the Jupiter system: to what extent is its possible habitability related to the initial conditions and formation scenario of the Jovian satellites? To what extent is it due to the way the Jupiter system works? ESA's Cosmic Vision programme offers an ideal and timely framework to address these three key questions. Building on the in-depth reconnaissance of the Jupiter System by Galileo (and the Voyager, Ulysses, Cassini and New Horizons fly-by's) and on the anticipated accomplishments of NASA's JUNO mission, it is now time to design and fly a new mission which will focus on these three major questions. LAPLACE, as we propose to call it, will deploy in the Jovian system a triad of orbiting platforms to perform coordinated observations of its main components: Europa, our priority target, the Jovian satellites, Jupiter's magnetosphere and its atmosphere and interior. LAPLACE will consolidate Europe's role and visibility in the exploration of the Solar System and will foster the development of technologies for the exploration of deep space in Europe. Its multi-platform and multi-target architecture, combined with its broadly multidisciplinary scientific Exp Astron (2009) 23:849-892 dimension, will provide an outstanding opportunity to build a broad international collaboration with all interested nations and space agencies.

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The tidal response of Ganymede and Callisto with and without liquid water oceans

Cited by 52 publications

References 24 publications

Measuring tidal deformations by laser altimetry. A performance model for the Ganymede Laser Altimeter

Measuring tidal deformations by laser altimetry. A performance model for the Ganymede Laser Altimeter

Tides on Satellites of Giant Planets

LAPLACE: A mission to Europa and the Jupiter System for ESA’s Cosmic Vision Programme

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