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Forward and Adjoint Calculations of Gravitational Potential in Heterogeneous, Aspherical Planets

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract We have developed a computational package for the calculation of numerically exact internal and external gravitational potential, its functional derivatives and sensitivity kernels, in an aspherical, heterogeneous planet. We detail our implementation, utilizing a transformation of the Poisson equation into a spherical reference domain, as well
Alex D. C. Myhill, Matthew A. Maitra, David Al‐Attar   +2 more
wiley   +1 more source

Watery Enceladus [PDF]

Physics Today, 2011
In 1980, telescopes revealed that one of Saturn’s rings is centered at the orbit of Enceladus, a medium-sized Saturnian moon. It was the first hint that Enceladus is a world like no other.
openaire   +1 more source

Using Tidally‐Driven Elastic Strains to Infer Regional Variations in Crustal Thickness at Enceladus

Geophysical Research Letters, 2023
Constraining the spatial variability of the thickness of the ice shell of Enceladus (i.e., the crust) is central to our understanding of the internal dynamics and evolution of this small Saturnian moon.
Alexander Berne, Mark Simons, James T. Keane, Ryan S. Park   +3 more
doaj   +1 more source

Polarimetry of Water Ice Particles Providing Insights on Grain Size and Degree of Sintering on Icy Planetary Surfaces [PDF]

, 2018
The polarimetry of the light scattered by planetary surfaces is a powerful tool to provide constraints on their microstructure. To improve the interpretation of polarimetric data from icy surfaces, we have developed the POLarimeter for ICE Samples ...
Cerubini, Romain, Jost, Bernhard, Poch, Olivier, Pommerol, Antoine, Thomas, Nicolas   +4 more
core   +4 more sources

Thermal Segregation and Reddening in Europa's Double Ridges

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Europa's double ridges often display lower albedo and redder color than their surroundings. Their unique topography may cause sublimation‐driven darkening due to illumination and self‐heating—the process of thermal segregation. We apply an advanced 3D thermophysical model, including shadowing and self‐heating through mutual exchange of ...
Kya C. Sorli, Paul O. Hayne, Lucas Lange, Sylvain Piqueux   +3 more
wiley   +1 more source

The pH of Enceladus’ ocean [PDF]

Geochimica et Cosmochimica Acta, 2015
Observational data from the Cassini spacecraft are used to obtain a chemical model of ocean water on Enceladus. The model indicates that Enceladus' ocean is a Na-Cl-CO3 solution with an alkaline pH of ~11-12. The dominance of aqueous NaCl is a feature that Enceladus' ocean shares with terrestrial seawater, but the ubiquity of dissolved Na2CO3 suggests ...
Glein, Christopher, Baross, John, Waite, Hunter   +2 more
openaire   +2 more sources

Evidence of Gaia Enceladus Experiencing at Least Two Passages around the Milky Way

The Astrophysical Journal Letters
One of the major recent breakthroughs has been the discovery of the last major merger to happen in the history of the Milky Way. Around 10 Gyr ago, the galaxy Gaia Enceladus with an estimated ∼10% of the Milky Way mass, fell into the potential of our ...
Ása Skúladóttir, Heitor Ernandes, Diane K. Feuillet, Alice Mori, Sofia Feltzing, Romain E. R. Lucchesi, Paola Di Matteo   +6 more
doaj   +1 more source

A primordial origin for the atmospheric methane of Saturn's moon Titan [PDF]

, 2009
The origin of Titan's atmospheric methane is a key issue for understanding the origin of the Saturnian satellite system. It has been proposed that serpentinization reactions in Titan's interior could lead to the formation of the observed methane ...
Alibert, Anderson, Atreya, Barr, Bockelée-Morvan, Bézard, Charlou, Cordier, Craig, Daniel Cordier, Fortes, Giardini, Grasset, Horner, J. Hunter Waite, Jonathan I. Lunine, Kathleen E. Mandt, Krasnopolsky, Lin, Lunine, Lécuyer, Lécuyer, Mai-Julie Nguyen, Matson, Matthew Pasek, McCollom, Mitri, Moody, Mousis, Mousis, Olivier Mousis, Oze, Pinto, Sakai, Sherwood Lollar, Sherwood Lollar, Tobie, Vennemann, Vuitton, Waite, Wenner, William S. Lewis   +41 more
core   +4 more sources

Possibility for albedo estimation of exomoons: Why should we care about M dwarfs? [PDF]

, 2016
Occultation light curves of exomoons may give information on their albedo and hence indicate the presence of ice cover on the surface. Icy moons might have subsurface oceans thus these may potentially be habitable.
Dobos, Vera, Kereszturi, Ákos, Kiss, László L., Pál, András   +3 more
core   +2 more sources

Comprehensive Characterization of Water Group Ion Composition and Distributions in Saturn's Magnetosphere With Cassini Plasma Spectrometer Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Saturn's magnetosphere is continuously supplied with neutrals from the Enceladus plume and the icy rings, which undergo ionization and charge‐exchange to form a complex water‐group plasma environment. While the Cassini Plasma Spectrometer (CAPS) instrument has provided extensive compositional information, detailed separation of individual ...
Thomas K. Kim, D. B. Reisenfeld, R. J. Wilson, H. T. Smith, A. K. Woodson, F. Allegrini, R. W. Ebert, M. G. Henderson, P. K. Kollmann, G. Livadiotis, G. Nicolaou, J. R. Szalay, P. W. Valek, A. Masters   +13 more
wiley   +1 more source