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Related papers: A new pattern in Saturn's D ring created in late 2…

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The alignment of Saturn's magnetic pole with its rotation axis precludes the use of magnetic field measurements to determine its rotation period. The period was previously determined from radio measurements by the Voyager spacecraft to be…

Earth and Planetary Astrophysics · Physics 2015-06-24 Ravit Helled , Eli Galanti , Yohai Kaspi

We present observations at optical wavelengths with the Cassini Spacecraft's Imaging Science System of the Phoebe ring, a vast debris disk around Saturn that seems to be collisionally generated by its irregular satellites. The analysis…

Earth and Planetary Astrophysics · Physics 2016-05-25 Daniel Tamayo , Stephen R. Markham , Matthew M. Hedman , Joseph A. Burns , Douglas P. Hamilton

The Cassini spacecraft provided key measurements during its more than twelve year mission that constrain the absolute age of Saturn's rings. These include the extrinsic micrometeoroid flux at Saturn, the volume fraction of non-icy…

Earth and Planetary Astrophysics · Physics 2023-05-24 Paul R. Estrada , Richard. H. Durisen

Stellar occultations by Saturn's rings observed with the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft reveal that dusty features such as the F ring and the ringlets in the Encke and the Laplace Gaps have…

Earth and Planetary Astrophysics · Physics 2011-09-23 M. M. Hedman , P. D Nicholson , M. R. Showalter , R. H. Brown , B. J. Buratti , R. N. Clark , K. Baines , C. Sotin

In this work, we model the radial density profile of the outer A ring of Saturn observed with Cassini cameras (Tiscareno & Harris 2018): An axisymmetric diffusion model has been developed, accounting for the outward viscous flow of the ring…

Earth and Planetary Astrophysics · Physics 2019-06-20 Fabio M. Grätz , Michael Seiler , Martin Seiß , Holger Hoffmann , Frank Spahn

In this article we explore the aspect of the F ring with respect to the anti-alignment configuration between the ring and Prometheus. We focus our attention on the shape of the F ring's azimuthal channels which were first reported by Porco…

Earth and Planetary Astrophysics · Physics 2015-05-13 Carlos E. Chavez

Saturn's inner B-ring and its C-ring support wavetrains of contrasting amplitudes but with similar length scales, 100-1000 km. In addition, the inner B-ring is punctuated by two intriguing `flat' regions between radii 93,000 km and 98,000…

Earth and Planetary Astrophysics · Physics 2015-10-14 Henrik Latter , Gordon Ogilvie , Marie Chupeau

Spacecraft observations of Saturn's rings show evidence of an active aggregation-disaggregation process triggered by periodic influences from the nearby moons. This leads to clumping and break-up of the ring particles at time-scales of the…

Earth and Planetary Astrophysics · Physics 2013-01-16 Pedro J. Torres , Prasanna Madhusudhanan , Larry W. Esposito

The origin of rings around giant planets remains elusive. Saturn's rings are massive and made of 90-95% of water ice. In contrast, the much less massive rings of Uranus and Neptune are dark and likely to have higher rock fraction. Here we…

Earth and Planetary Astrophysics · Physics 2016-11-15 Ryuki Hyodo , Sébastien Charnoz , Keiji Ohtsuki , Hidenori Genda

This chapter summarizes our current understanding of the ionosphere of Saturn. We give an overview of Saturn ionospheric science from the Voyager era to the present, with a focus on the wealth of new data and discoveries enabled by Cassini,…

Earth and Planetary Astrophysics · Physics 2021-06-23 Luke Moore , Marina Galand , Arvydas J. Kliore , Andrew F. Nagy , James O'Donoghue

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.…

The accurate determination of Saturn's gravitational coefficients by Cassini could provide tighter constrains on Saturn's internal structure. Also, occultation measurements provide important information on the planetary shape which is often…

Earth and Planetary Astrophysics · Physics 2015-06-15 Ravit Helled , Tristan Guillot

The best constraints on the internal structures of giant planets have historically come from measurements of their gravity fields. These gravity data are inherently mostly sensitive to a planet's outer regions, providing only loose…

Earth and Planetary Astrophysics · Physics 2021-05-05 Christopher Mankovich , Jim Fuller

Far-IR 16-1000 $\mu$m spectra of Saturn's hydrogen-helium continuum measured by Cassini's Composite Infrared Spectrometer (CIRS) are inverted to construct a near-continuous record of upper tropospheric (70-700 mbar) temperatures and…

Earth and Planetary Astrophysics · Physics 2015-10-14 Leigh N. Fletcher , Patrick G. J. Irwin , Richard K. Achterberg , Glenn S. Orton , F. Michael Flasar

We revisit the evidence for a "dust cloud" observed by the Cassini spacecraft at Saturn in 2006. The data of four instruments are simultaneously compared to interpret the signatures of a coherent swarm of dust that would have remained near…

Earth and Planetary Astrophysics · Physics 2020-05-04 Emil Khalisi

Throughout 2017, the Hubble Space Telescope (HST) observed the northern far-ultraviolet aurorae of Saturn at northern solstice, during the Cassini Grand Finale. These conditions provided a complete viewing of the northern auroral region…

Earth and Planetary Astrophysics · Physics 2018-08-27 L. Lamy , R. Prangé , C. Tao , T. Kim , S. V. Badman , P. Zarka , B. Cecconi , W. S. Kurth , W. Pryor , E. Bunce , A. Radioti

On June 12, 2007 the Cassini probe sent the images of a small moon of Saturn called Atlas which is located between the ring A and the small ring R/2004 S 1. These images have shown that the Atlas morphology is very different from other…

Astrophysics · Physics 2007-08-14 Enrique Ordaz Romay

Observed first by amateur astronomer Stephen J. O'Meara in the 1970s and then subsequently observed by the Voyager Spacecraft flybys in the early 1980s, it was realised that the 'spokes' flare out like spokes on a bicycle wheel. The…

Earth and Planetary Astrophysics · Physics 2023-06-16 Fenton John Doolan

We analyze several thousand Cassini ISS images in order to study the inner edge of the Keeler gap in Saturn's outer A ring. We find strong evidence for an m=32 perturbation with a mean amplitude of radial variation of 4.5 km. Phase analysis…

Earth and Planetary Astrophysics · Physics 2017-09-08 Radwan Tajeddine , Philip D. Nicholson , Matthew S. Tiscareno , Matthew M. Hedman , Joseph A. Burns , Maryame El Moutamid

The detection of O2+ and O+ ions over Saturn's main rings by the Cassini INMS and CAPS instruments at Saturn orbit insertion (SOI) in 2004 confirmed the existence of the ring atmosphere and ionosphere. The source mechanism was suggested to…

Earth and Planetary Astrophysics · Physics 2015-06-03 W. -L. Tseng , R. E. Johnson , M. K. Elrod
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