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Related papers: Saturn's ULF wave foreshock boundary: Cassini obse…

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Certain spiral density waves in Saturn's rings are generated through resonances with planetary normal modes, making them valuable probes of Saturn's internal structure. Previous research has primarily focused on the rotation rates of these…

A planet's magnetosheath extends from downstream of its bow shock up to the magnetopause where the solar wind flow is deflected around the magnetosphere and the solar wind embedded magnetic field lines are draped. This makes the region an…

Earth and Planetary Astrophysics · Physics 2015-02-20 A. H. Sulaiman , A. Masters , M. K. Dougherty , X. Jia

We present an analysis of data about Saturn's atmosphere from Cassini's Visual and Infrared Mapping Spectrometer (VIMS), focusing on the meteorology of the features seen in the 5-micron spectral window. We present VIMS mosaics and discuss…

Earth and Planetary Astrophysics · Physics 2013-01-28 David S. Choi , Adam P. Showman , Robert H. Brown

Seismology of the gas giants holds the potential to resolve long-standing questions about their internal structure and rotation state. We construct a family of Saturn interior models constrained by the gravity field and compute their…

Earth and Planetary Astrophysics · Physics 2019-01-23 Christopher Mankovich , Mark S. Marley , Jonathan J. Fortney , Naor Movshovitz

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

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 lightning activity in Saturn's atmosphere has been monitored by Cassini for more than six years. The continuous observations of the radio signatures called SEDs (Saturn Electrostatic Discharges) combine favorably with imaging…

Earth and Planetary Astrophysics · Physics 2011-11-22 G. Fischer , U. A. Dyudina , W. S. Kurth , D. A. Gurnett , P. Zarka , T. Barry , M. Delcroix , C. Go , D. Peach , R. Vandebergh , A. Wesley

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

We study the interaction of upstream ultra-low frequency (ULF) waves with collisionless shocks by analyzing the outputs of eleven 2D local hybrid simulation runs. Our simulated shocks have Alfv\'enic Mach numbers between 4.29-7.42 and their…

The last 22.5 orbits of the Cassini mission brought the spacecraft to less than 3000 km from Saturn's 1-bar surface. These close encounters offered an unprecedented view of Saturn's magnetic field, including contributions from the internal…

Saturn's moon Titan possesses stratospheric zonal winds that places it among a sparse class of planetary bodies known to have superrotation in their atmospheres. Few measurements have been made of these speeds in the upper stratosphere,…

Earth and Planetary Astrophysics · Physics 2024-04-16 Siobhan Light , Mark Gurwell , Alexander Thelen , Nicholas Lombardo , Conor Nixon

With recent advances in the modeling of the solar system giant planets, rapid progress has been made in understanding the remaining questions pertaining to their formation and evolution. However, this progress has largely neglected the…

Earth and Planetary Astrophysics · Physics 2026-02-04 Yubo Su , Janosz W. Dewberry , Roberto Tejada Arevalo , Ankan Sur , Adam Burrows

Voyager images and Cassini occultation data have previously shown that the behavior of the outer edge of Saturn's massive B ring is determined only in part by a static response to the 2:1 inner Lindblad resonance with Mimas. In Cassini…

Earth and Planetary Astrophysics · Physics 2010-11-11 Joseph N. Spitale , Carolyn C. Porco

The Cassini mission entered the Grand Finale phase in April 2017 and executed 22.5 highly inclined, close-in orbits around Saturn before diving into the planet on September 15th 2017. Here we present our analysis of the Cassini Grand Finale…

Earth and Planetary Astrophysics · Physics 2019-11-19 Hao Cao , Michele K. Dougherty , Gregory J. Hunt , Gabrielle Provan , Stanley W. H. Cowley , Emma J. Bunce , David J. Stevenson

The spatial distribution and polarization of Saturn narrowband (NB) emissions have been studied by using Cassini Radio and Plasma Wave Sciences data and goniopolarimetric data obtained through an inversion algorithm with a preset source…

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

We present a review of Saturn's interior structure and thermal evolution, with a particular focus on work in the past 5 years. Data from the Cassini mission, including a precise determination of the gravity field from the Grand Finale…

Normal mode seismology is a promising means of measuring rotation in gas giant interiors, and ring seismology presents a singular opportunity to do so at Saturn. We calculate Saturn's normal modes of oscillation and zonal gravity field,…

Earth and Planetary Astrophysics · Physics 2023-03-30 Christopher R. Mankovich , Janosz W. Dewberry , Jim Fuller

How deep do Saturn's zonal winds penetrate below the cloud-level has been a decades-long question, with important implications not only for the atmospheric dynamics, but also for the interior density structure, composition, magnetic field…

Earth and Planetary Astrophysics · Physics 2019-02-13 Eli Galanti , Yohai Kaspi , Yamila Miguel , Tristan Guillot , Daniele Durante , Paolo Racioppa , Luciano Iess

Tidal dissipation inside giant planets is important for the orbital evolution of their natural satellites. It is conventionally treated by parameterized equilibrium tidal theory, in which the tidal torque declines rapidly with distance, and…

Earth and Planetary Astrophysics · Physics 2017-12-13 Jing Luan , Jim Fuller , Eliot Quataert