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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Filacchione, Gianrico
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2021VIS-IR Spectroscopy of Mixtures of Water Ice, Organic Matter, and Opaque Mineral in Support of Small Body Remote Sensing Observationscitations
- 2020An orbital water-ice cycle on comet 67P from colour changescitations
- 2017Spectrophotometric study of Saturn's main rings by means of Monte Carlo ray-tracing and Hapke's theory
- 2017From the Icy Satellites to Small Moons and Rings: Spectral Indicators by Cassini-VIMS Unveil Compositional Trends in the Saturnian System
- 2015Investigations of Saturn’s Main Rings over Broad Range of Wavelengths
- 2015The Ring System of Saturn as Seen by Cassini-VIMS (Invited)
- 2015Saturn B and C ring studies at multiple wavelengths
- 2015Studies of Saturn's Main Rings at Multiple Wavelengths
- 2013Constraints on Saturn ring particle properties and ring structure: Studies of Saturn's rings from UV to far IR
- 2013Surface Composition of the Non-Ice Component on Icy Satellites and Ring Particles in the Saturn System
- 2013Multiwavelength studies of Saturn's rings
- 2012Multi-wavelength studies of Saturn's rings to constrain ring particle properties and ring structure
- 2012Multi-wavelength studies of Saturn's rings to constrain ring particle properties and ring structure: the VIMS perspective
- 2012Studies of Saturn's rings from UV to far IR: Constraints on ring particle properties and ring structure
- 2011Composition and Grain Sizes of Dark Material in Saturn's Icy Satellites and Rings
- 2011The Composition of Saturn's Rings and Satellites from Cassini VIMS and UVIS
- 2010Spectrophotometric Modeling of Enceladus Surface Properties and Composition from Vims Data
- 2010VIS-IR spectral modeling of Rhea and Enceladus
- 2008The Composition of Saturn's Rings
- 2007Saturn's Rings Observed with Cassini-VIMS
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document
The Ring System of Saturn as Seen by Cassini-VIMS (Invited)
Abstract
Since 2004 the Visual and Infrared Mapping Spectrometer (VIMS) aboard Cassini has acquired numerous hyperspectral mosaics in the 0.35-5.1 μm spectral range of Saturn's main rings in very different illumination and viewing geometries. These observations have allowed us to infer the ring particles physical properties and composition: water ice abundance is estimated through the 1.25-1.5-2.0 μm band depths, chromophores distribution is derived from visible spectral slopes while organic material is traced by the aliphatic compounds signature at 3.42 μm which appears stronger on CD and C ring than on A-B rings (Filacchione et al., 2014). Observed reflectance spectra are fitted with a spectrophotometric model based on Montecarlo ray-tracing with the scope to infer particles composition while disentangling photometric effects (caused by multiple scattering, opposition surge and forward scattering) which depend on illumination/viewing geometries. Spectral bond albedo for different regions of the rings has been best-fitted using Hapke's radiative transfer modeling (Ciarniello et al, 2011) by choosing different mixtures of water ice, tholin, and amorphous carbon particles populations. While tholin distribution seems to be fairly constant across the rings, the amorphous carbon appears anti-correlated with optical depth. Moreover, dark material contamination is less effective on densest regions, where the more intense rejuvenation processes occur, in agreement with the ballistic transport theory (Cuzzi and Estrada,1998). Finally, the 3.6 μm continuum peak wavelength is used to infer particles temperature, which is anti-correlated with the albedo and the optical depth (tau): low-albedo/low-tau C ring and CD have higher temperatures than A-B rings where albedo and tau are high. This trend matches direct temperature measurements by CIRS (Spilker et al., 2013)....