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Saturn's F ring is subject to dynamic structural changes over short periods. Among the observed phenomena are diffuse extended bright clumps (ECs) ~ 3-40 degrees in longitudinal extent. These ECs appear, evolve, and disappear over a span of…

Earth and Planetary Astrophysics · Physics 2014-08-13 Robert S. French , Shannon K. Hicks , Mark R. Showalter , Adrienne K. Antonsen , Douglas R. Packard

Photometric surveys for exoplanetary ring systems have not confirmed any object with Saturn-sized ring. We systematically analyse 308 TESS planet candidates, mainly comprised of giant short-period planets orbiting nearby bright stars. These…

Earth and Planetary Astrophysics · Physics 2025-05-12 Tsubasa Umetani , Masataka Aizawa , Yuichiro Ezoe , Yoshitaka Ishisaki

The debris disk of HIP73145 has been detected in scattered light in the near-IR, and at far-IR wavelengths before, but no substructure has been seen so far. Detection of such substructures in combination with detailed modeling can hint at…

The origin of the irregular satellites of the giant planets has been long debated since their discovery. Their dynamical features argue against an in-situ formation suggesting they are captured bodies, yet there is no global consensus on…

Earth and Planetary Astrophysics · Physics 2010-11-29 D. Turrini , F. Marzari , F. Tosi

Images obtained by the Cassini spacecraft between 2012 and 2015 reveal a periodic brightness variation in a region of Saturn's D ring that previously appeared to be rather featureless. Furthermore, the intensity and radial wavenumber of…

Earth and Planetary Astrophysics · Physics 2016-08-31 M. M. Hedman , M. R. Showalter

Saturn's rings, reminiscent of an early Solar System present a unique opportunity to investigate experimentally some mechanisms thought to be responsible for planet and planetesimal formation in protoplanetary discs. Here we extended the…

Earth and Planetary Astrophysics · Physics 2015-06-18 Phil J Sutton , Feo Kusmartsev

A new model for the shape of the prominent eccentric ringlet in the gap exterior to Saturn's B-ring is developed based on Cassini imaging observations taken over about 8 years. Unlike previous treatments, the new model treats each edge of…

Earth and Planetary Astrophysics · Physics 2016-08-31 Joseph N. Spitale , Joseph M. Hahn

Aegaeon (Saturn LIII, S/2008 S1) is a small satellite of Saturn that orbits within a bright arc of material near the inner edge of Saturn's G ring. This object was observed in 21 images with Cassini's Narrow-Angle Camera between June 15…

Earth and Planetary Astrophysics · Physics 2011-04-07 M. M. Hedman , N. J. Cooper , C. D. Murray , K. Beurle , M. W. Evans , M. S. Tiscareno , J. A. Burns

Certain regions of Saturn's rings exhibit periodic opacity variations with characteristic radial wavelengths of up to a few hundred meters that have been attributed to viscous overstabilities. The Visual and Infrared Mapping Spectrometer…

Earth and Planetary Astrophysics · Physics 2015-06-19 M. M. Hedman , P. D. Nicholson , H. Salo

Solid state CO$_2$ has been detected throughout the outer solar system, even at temperatures where crystalline CO$_2$ is unstable, requiring that the CO$_2$ be trapped in a separate host material. The Saturnian satellites provide an ideal…

Earth and Planetary Astrophysics · Physics 2025-06-26 Michael E. Brown , Samantha K. Trumbo , Matthew Belyakov , M. Ryleigh Davis , Ashma Pandaya

Although the rotation of some Saturn's satellites in spin-orbit has already been studied by several authors, this is not the case of the rotation of Phoebe, which has the particularity of being non resonant. The purpose of the paper is to…

Earth and Planetary Astrophysics · Physics 2015-05-19 L. Cottereau , E. Aleshkina , J. Souchay

Irregular moons are a class of satellite found orbiting all of the Solar System's giant planets: as their orbits don't match those of their planets, they are theorised to have formed elsewhere in the Solar System and were subsequently…

Earth and Planetary Astrophysics · Physics 2021-12-20 George Bell

Using Spitzer photometry at 4.5 microns, we search for rings and satellites around the long period transiting planet CoRoT-9b. We observed two transits in 2010 and 2011. From their non-detection, we derive upper limits on the plausible…

A debris ring around the star HD 207129 (G0V; d = 16.0 pc) has been imaged in scattered visible light with the ACS coronagraph on the Hubble Space Telescope and in thermal emission using MIPS on the Spitzer Space Telescope at 70 microns…

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

D68 is a narrow ringlet located only 67,627 km (1.12 planetary radii) from Saturn's spin axis. Images of this ringlet obtained by the Cassini spacecraft reveal that this ringlet exhibits persistent longitudinal brightness variations and a…

Earth and Planetary Astrophysics · Physics 2015-06-18 M. M. Hedman , J. A. Burt , J. A. Burns , M. R. Showalter

In its decade of operation the Cassini mission has allowed us to look deep into Saturn's atmosphere and investigate the processes occurring below its enshrouding haze. We use Visual and Infrared Mapping Spectrometer (VIMS) 4.6-5.2 micron…

Earth and Planetary Astrophysics · Physics 2016-02-16 Joanna K Barstow , Patrick G. J. Irwin , Leigh N. Fletcher , Rohini S. Giles , Cecile Merlet

Seismology allows for direct observational constraints on the interior structures of stars and planets. Recent observations of Saturn's ring system have revealed the presence of density waves within the rings excited by oscillation modes…

Earth and Planetary Astrophysics · Physics 2015-04-30 Jim Fuller

In this paper we will summarize some of the most important results of the Cassini mission concerning the satellites of Saturn. Given the long duration of the mission, the complexity of the payload onboard the Cassini Orbiter and the amount…

Earth and Planetary Astrophysics · Physics 2009-11-19 A. Coradini , F. Capaccioni , P. Cerroni , G. Filacchione , G. Magni , R. Orosei , F. Tosi , D. Turrini

Some wave features found in the C-ring of Saturn appear to be excited by resonances with normal mode oscillations of the planet. The waves are found at locations in the rings where the ratio of orbital to oscillation frequencies is given by…

Earth and Planetary Astrophysics · Physics 2015-06-18 Mark S. Marley