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Related papers: Kronoseismology: Using density waves in Saturn's C…

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On 17 October 2008, the Cassini spacecraft crossed the southern sources of Saturn kilometric radiation (SKR), while flying along high-latitude nightside magnetic field lines. In situ measurements allowed us to characterize for the first…

Earth and Planetary Astrophysics · Physics 2011-01-21 L. Lamy , P. Schippers , P. Zarka , B. Cecconi , C. Arridge , M. K. Dougherty , P. Louarn , N. Andre , W. S. Kurth , R. L. Mutel , D. A. Gurnett , A. J. Coates

Using the Advanced CCD Imaging Spectrometer (ACIS), the Chandra X-ray Observatory (CXO) observed the Saturnian system for one rotation of the planet (~37 ks) on 20 January, 2004, and again on 26-27 January, 2004. In this letter we report…

Cassini radio science experiments have provided multiple occultation optical depth profiles of Saturn's rings that can be used in combination to analyze density waves. This paper establishes an accurate procedure of inversion of the wave…

Earth and Planetary Astrophysics · Physics 2015-05-18 N. J. Rappaport , P. -Y. Longaretti , R. G. French , E. A. Marouf , C. A. McGhee

Over the last eight years, the Visual and Infrared Mapping Spectrometer (VIMS) aboard the Cassini orbiter has returned hyperspectral images in the 0.35-5.1 micron range of the icy satellites and rings of Saturn. These very different objects…

The origin and long-term evolution of Saturn's rings is still an unsolved problem in modern planetary science. In this chapter we review the current state of our knowledge on this long-standing question for the main rings (A, Cassini…

Earth and Planetary Astrophysics · Physics 2015-05-14 Sebastien Charnoz , Luke Dones , Larry W. Esposito , Paul R. Estrada , Matthew M. Hedman

We perform axisymmetric hydrodynamical simulations that describe the nonlinear outcome of the viscous overstability in dense planetary rings. These simulations are particularly relevant for Cassini observations of fine-scale structure in…

Earth and Planetary Astrophysics · Physics 2015-05-19 Henrik N. Latter , Gordon I. Ogilvie

We present a study of the behavior of Saturn's A ring outer edge, using images and occultation data obtained by the Cassini spacecraft over a period of 8 years from 2006 to 2014. More than 5000 images and 170 occultations of the A ring…

In the last few years Cassini-VIMS, the Visible and Infared Mapping Spectrometer, returned to us a comprehensive view of the Saturn's icy satellites and rings. After having analyzed the satellites' spectral properties (Filacchione et al.…

Saturn's mid-sized moons (satellites) have a puzzling orbital configuration with trapping in mean-motion resonances with every other pairs (Mimas-Tethys 4:2 and Enceladus-Dione 2:1). To reproduce their current orbital configuration on the…

Earth and Planetary Astrophysics · Physics 2020-08-19 Ayano Nakajima , Shigeru Ida , Yota Ishigaki

A multi-decade record of ground-based mid-infrared (7-25 $\mu$m) images of Saturn is used to explore seasonal and non-seasonal variability in thermal emission over more than a Saturnian year (1984-2022). Thermal emission measured by 3-m and…

The viscous spreading of planetary rings is believed to be counteracted by satellite torques, either through an individual resonance or through overlapping resonances. For the A ring of Saturn, it has been commonly believed that the…

Earth and Planetary Astrophysics · Physics 2017-10-25 Radwan Tajeddine , Philip D. Nicholson , Pierre-Yves Longaretti , Maryame El Moutamid , Joseph A. Burns

At the solar equinox in August 2009, the Composite Infrared Spectrometer (CIRS) onboard Cassini showed the lowest Saturn's ring temperatures ever observed. Detailed radiative transfer models show that the observed equinox temperatures of…

Earth and Planetary Astrophysics · Physics 2015-09-01 Ryuji Morishima , Linda Spilker , Shawn Brooks , Estelle Deau , Stu Pilorz

We present an extensive data set of ~150 localized features from Cassini images of Saturn's Ring A, a third of which are demonstrated to be persistent by their appearance in multiple images, and half of which are resolved well enough to…

Astrophysics · Physics 2008-02-14 Matthew S. Tiscareno , Joseph A. Burns , Matthew M. Hedman , Carolyn C. Porco

Since 2004, the images obtained by Cassini spacecraft's on-board cameras have revealed the existence of several small satellites in the Saturn system. Some of these small satellites are embedded in arcs of particles. While these satellites…

Earth and Planetary Astrophysics · Physics 2016-06-17 N. C. S. Araujo , E. Vieira Neto , D. W. Foryta

We observe Saturn and its ring system at wavelengths of 1.3 mm (220 GHz) using the Combined Array for Research in Millimeter-wave Astronomy (CARMA) interferometric array. We study the intensity and polarisation structure of the planet and…

Earth and Planetary Astrophysics · Physics 2015-11-13 Moumita Aich , Kenda Knowles , Kavilan Moodley , Jonathan Sievers , Matthew M. Hedman

We analyze data retrieved by the Imaging Science System onboard the Cassini spacecraft to study the horizontal velocity and vorticity fields of Saturn's Polar Regions (latitudes 60-90$^\circ$N in June-December 2013 and 60-90$^\circ$S in…

Earth and Planetary Astrophysics · Physics 2024-02-13 A. Antuñano , T. del Río-Gaztelurrutia , A. Sánchez-Lavega , R. Hueso

Saturn's rings are composed of icy grains, most in the mm to m size ranges, undergoing several collisions per orbit. Their collective behaviour generates a remarkable array of structure over many orders of magnitude, much of it not well…

Earth and Planetary Astrophysics · Physics 2023-01-18 Rémy Larue , Henrik Latter , Hanno Rein

Planetary rings sustain a continual bombardment of hypervelocity meteoroids that erode the surfaces of ring particles on time scales of 10^5 - 10^7 years. The debris ejected from such impacts re-accretes on to the ring, though often at a…

Earth and Planetary Astrophysics · Physics 2015-06-11 Henrik Latter , Gordon Ogilvie , Marie Chupeau

Tidal interactions between Saturn and its satellites play a crucial role in both the orbital migration of the satellites and the heating of their interiors. Therefore constraining the tidal dissipation of Saturn (here the ratio k2/Q) opens…

Earth and Planetary Astrophysics · Physics 2015-06-04 V. Lainey , Ö. Karatekin , J. Desmars , S. Charnoz , J-E. Arlot , N. Emelyanov , C. Le Poncin-Lafitte , S. Mathis , F. Remus , G. Tobie , J-P. Zahn

Whistler-mode waves are generated within and can propagate upstream of collisionless shocks. They are known to play a role in electron thermodynamics/acceleration and, under certain conditions, are markedly observed as wave trains preceding…