98 citations · 296 across the 11 of their papers we have counts for
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Are Thalassa and Despina in Resonance Lock with Neptune's Oscillations?
Matija Ćuk, Harrison F. Agrusa, Marina Brozović +1
The two innermost moons of Neptune, Naiad and Thalassa, are currently in a 73:69 mean-motion resonance. This resonance relies on the large inclination of Naiad, and we estimate tha…
Unveiling What Makes Saturn Ring: Quantifying the Amplitudes of Saturn's Planetary Normal-Mode Oscillations and Trends in C-Ring Properties Using Kronoseismology (VII)
Victor M Afigbo, Matthew M Hedman, Phillip Nicholson +4
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 re…
Setting the Stage for Uranian Seismology from Rings and Radial Velocities
Christopher R. Mankovich, A. James Friedson, Marzia Parisi +6
A Uranus orbiter would be well positioned to detect the planet's free oscillation modes, whose frequencies can resolve questions about Uranus's weakly constrained interior. We calc…
A Survey of Cassini Images of Spokes in Saturn's Rings: Unusual Spoke Types and Seasonal Trends
S. R. Callos, M. M. Hedman, D. P. Hamilton
Spokes are localized clouds of fine particles that appear over the outer part of Saturn's B ring. Over the course of the Cassini Mission, the Imaging Science Subsystem (ISS) obtain…
Kronoseismology V: A Panoply of Waves in Saturn's C Ring Driven by High-Order Internal Planetary Oscillations
R. G. French, B. Bridges, M. M. Hedman +3
Saturn's rings act as a system of innumerable test particles that are remarkably sensitive to periodic disturbances in the planet's gravitational field. We identify 15 additional d…
Kronoseismology IV. Six previously unidentified waves in Saturn's middle C ring
M. M. Hedman, P. D. Nicholson, R. G. French
Recent studies of stellar occultations observed by the Visual and Infrared Mapping Spectrometer (VIMS) onboard the Cassini spacecraft have demonstrated that multiple spiral wave st…
The B-ring's surface mass density from hidden density waves: Less than meets the eye?
M. M. Hedman, P. D. Nicholson
Saturn's B ring is the most opaque ring in our solar system, but many of its fundamental parameters, including its total mass, are not well constrained. Spiral density waves genera…
A new pattern in Saturn's D ring created in late 2011
M. M. Hedman, M. R. Showalter
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 featurel…
Corrugations and eccentric spirals in Saturn's D ring: New insights into what happened at Saturn in 1983
M. M. Hedman, J. A. Burns, M. R. Showalter
Previous investigations of Saturn's outer D ring (73,200-74,000 km from Saturn's center) identified periodic brightness variations whose radial wavenumber increased linearly over t…
More Kronoseismology with Saturn's rings
M. M. Hedman, P. D. Nicholson
In a previous paper (Hedman and Nicholson 2013), we developed tools that allowed us to confirm that several of the waves in Saturn's rings were likely generated by resonances with…
Kronoseismology: Using density waves in Saturn's C ring to probe the planet's interior
M. M. Hedman, P. D. Nicholson
Saturn's C ring contains multiple spiral patterns that appear to be density waves driven by periodic gravitational perturbations. In other parts of Saturn's rings, such waves are g…