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Showing 1 to 13 of 13 for “"Enceladus"”.
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An analysis of cryovolcano plumes on Enceladus by light scattering and polarimetry
Enceladus, the sixth largest moon of Saturn, is known to be a geologically active icy body. Observations by NASA’s Cassini spacecraft show that Enceladus has cryovolcanoes on its south pole as well as a global subsurface ocean hidden beneath its frozen crust. Photographs from Cassini during flybys …
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Circumplanetary dust dynamics : application to Martian dust tori and Enceladus dust plumes
… dust dynamics in the vicinity of Saturnian moon Enceladus. During three flybys of the Cassini spacecraft with Enceladus, the on-board dust detector registered a micron-sized dust population around the moon. Surprisingly, the peak of the measured impact rate occurred 1 minute before the closest …
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Photometric and spectral analysis of the distribution of crystalline and amorphous ices on Enceladus as seen by Cassini
… composition of the surface of Saturn's satellite Enceladus. Spectral cubes, which contain both spatial and spectral information, were obtained of this satellite with a wavelength distribution in the infrared far more extensive than from any previous observations and at much higher resolution. …
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Some Excursions Into Saturn's Faint Rings
… in the equatorial plane of the rings near Enceladus' orbit. We have conducted numerical simulations, supported by orderof-magnitude analytical calculations, to investigate how particles behave in the vicinity of Enceladus' orbit to form the observed vertical structure. We also show that the …
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Tidal heating and tidal evolution in the solar system
… system. We constrain the equilibrium heating of Enceladus to be less than 1.1(18000/QS) GW, where QS is the tidal quality factor of Saturn. The constraint on the heat flow is calculated from simple conservation of energy and angular momentum arguments and does not depend on the internal …
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Modeling Non-Rotational Ocean Circulation and Heat Distribution in Icy Moons
… the ice shells of icy moons like Europa and Enceladus are considered promising environments for extraterrestrial life. Their long-term habitability depends on internal heating and efficient vertical heat transport to maintain liquid water beneath the surface. This study models vertical heat …
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Formation and dynamics of the Galactic disc and halo
… accreted stellar component (like Gaia Sausage-Enceladus in the MW) tend to have lower spin than those with more isotropic accreted stellar velocity distributions. Chapter 7 uses the ARTEMIS simulations to study the formation (spin-up) of the Milky Way's disc. Most simulated galaxies spin up at …
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Microbial communities, activities, and metabolisms in Earth’s subseafloor and analog oceanic environments
… chemistry of the ocean on one of Saturn’s moons, Enceladus, and evaluates the genomic and physiological characteristics of microbial enrichments and isolates that may be relevant for survival in such extraterrestrial ocean environments. Chapter 6 characterizes six novel Marinobacter shengliensis …
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Phenotypic Switching of Bacterial Cells in Extreme Environments
… solar system, such as Mars, Europa, Ceres, and Enceladus, where the presence of liquid water is known.</p>
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Accreted Globular Clusters in External Galaxies: Why Adaptive Dynamics won’t work
… we confirm this result in the stars of Gaia-Enceladus, one of the few DG mergers of our MW that we know of. Their action distribution is smeared out extensively. Based on these results, we propose that modellers need to find and develop more realistic distribution functions for GCs of a …
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Unveiling the History and Nature of the Milky Way with Galactic Surveys and Numerical Simulations
… and abundances of the recently discovered Gaia-Enceladus association, which is proposed to be the debris of a singular and massive accretion event. By comparing the kinematics and abundances of Gaia-Enceladus to the debris of satellites accreted onto Milky Way analogues in the EAGLE simulations, …
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Star Cluster Formation and Galactic Assembly: from instrumentation, to observations and simulations
… tags for accreted stars from the Gaia-Sausage- Enceladus (GSE) merger using high resolution spectroscopy. The two GCs, NGC 288 and NGC 362, dynamically associated with GSE, are compared with these tags to test chemical association. A galactic chemical evolution (GCE) model is built for GSE and …
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Star Cluster Formation and Galactic Assembly: from instrumentation, to observations and simulations
… tags for accreted stars from the Gaia-Sausage- Enceladus (GSE) merger using high resolution spectroscopy. The two GCs, NGC 288 and NGC 362, dynamically associated with GSE, are compared with these tags to test chemical association. A galactic chemical evolution (GCE) model is built for GSE and …