R. G. Jerousek
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View article: Opaque Expanses in Saturn’s B ring
Opaque Expanses in Saturn’s B ring Open
Stellar occultation measurements of Saturn’s rings from the Cassini Ultraviolet Imaging Spectrograph (UVIS) High Speed Photometer (HSP) reveal dozens of regions in the heart of the B ring that are opaque at the sensitivity level of the mea…
View article: A Comparison of Orbital Phase-Resolved Mesoscale Structure and Particle Sizes in the Narrow and Eccentric Rings of Saturn and Uranus
A Comparison of Orbital Phase-Resolved Mesoscale Structure and Particle Sizes in the Narrow and Eccentric Rings of Saturn and Uranus Open
We present a comparative occultation analysis of narrow, eccentric ringlets in the Saturnian and Uranian ring systems, focusing on how mesoscale structure and particle size distributions vary with orbital phase (true anomaly). Our study co…
View article: Unveiling What Makes Saturn Ring: Quantifying the Amplitudes of Saturn's Planetary Normal‐Mode Oscillations and Trends in C‐Ring Properties Using Kronoseismology (VII)
Unveiling What Makes Saturn Ring: Quantifying the Amplitudes of Saturn's Planetary Normal‐Mode Oscillations and Trends in C‐Ring Properties Using Kronoseismology (VII) Open
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…
View article: Shape and compression of self-gravity wakes in Saturn’s rings
Shape and compression of self-gravity wakes in Saturn’s rings Open
<p>The varying geometry of Cassini star occultations by Saturn&#8217;s rings constrains both the size and shape of structures that block starlight. Statistics of UVIS star occultations measure structures as small as meters, on ti…
View article: Characterizing self-gravity wake morphology in Saturn&#8217;s rings from Cassini UVIS stellar occultation statistics
Characterizing self-gravity wake morphology in Saturn’s rings from Cassini UVIS stellar occultation statistics Open
 Cassini’s Ultraviolet Imaging Spectrograph (UVIS) observed 276 stellar occultations of Saturn’s rings over the course of its mission. During these occultations, UVIS’ High-Speed Photometer (HSP) collected photon cou…
View article: Phantoms in the Dark: Mesoscale Openings in the Core of Saturn&#8217;s B Ring
Phantoms in the Dark: Mesoscale Openings in the Core of Saturn’s B Ring Open
The Cassini Ultraviolet Imaging Spectrograph (UVIS) High Speed Photometer (HSP) observed 15 occultation traces of the bright star Hadar (Beta Centauri) in 2008-2009 at an elevation above the ring plane of 66.7 degrees. The combination of t…
View article: Flattening of ring particles and self-gravity wakes in Saturn&#8217;s rings
Flattening of ring particles and self-gravity wakes in Saturn’s rings Open
The varying geometry of Cassini star occultations by Saturn’s rings constrains both the size and shape of structures that block starlight. Statistics of UVIS star occultations measure structures as small as meters, on times scales of…
View article: Frontiers in Planetary Rings Science
Frontiers in Planetary Rings Science Open
We now know that the outer solar system is host to at least six diverse planetary ring systems, each of which is a scientifically compelling target with the potential to inform us about the evolution, history and even the internal structur…
View article: Flattening of ring particles and self-gravity wakes in Saturn&#8217;s rings
Flattening of ring particles and self-gravity wakes in Saturn’s rings Open
<p>The varying geometry of Cassini star occultations by Saturn&#8217;s rings constrains both the size and shape of structures that block starlight. Statistics of UVIS star occultations measure structures as small as meters, on ti…
View article: Frontiers in Planetary Rings ScienceA Science White Paper for the Planetary Science and Astrobiology Decadal Survey 2023-2032
Frontiers in Planetary Rings ScienceA Science White Paper for the Planetary Science and Astrobiology Decadal Survey 2023-2032 Open
A Science White Paper for the Planetary Science and Astrobiology Decadal Survey 2023-2032
View article: Sizes of Particles, Clumps, and Gaps Within the Strong Janus 2:1 and Mimas 5:3 Density Waves from Cassini UVIS Stellar Occultation Data Statistics
Sizes of Particles, Clumps, and Gaps Within the Strong Janus 2:1 and Mimas 5:3 Density Waves from Cassini UVIS Stellar Occultation Data Statistics Open
The high-speed photometer of Cassini’s Ultraviolet Imaging Spectrograph (UVIS) collected data from stellar occultations across Saturn’s rings at unprecedented high resolution over a wide range of viewing geometries. Because pho…
View article: Frontiers in Planetary Rings Science
Frontiers in Planetary Rings Science Open
We now know that the outer solar system is host to at least six diverse planetary ring systems, each of which is a scientifically compelling target with the potential to inform us about the evolution, history and even the internal structur…
View article: Close-range remote sensing of Saturn’s rings during Cassini’s ring-grazing orbits and Grand Finale
Close-range remote sensing of Saturn’s rings during Cassini’s ring-grazing orbits and Grand Finale Open
Cassini's last look at Saturn's rings During the final stages of the Cassini mission, the spacecraft flew between the planet and its rings, providing a new view on this spectacular system (see the Perspective by Ida). Setting the scene, Sp…
View article: Determining the Small-scale Structure and Particle Properties in Saturn's Rings from Stellar and Radio Occultations
Determining the Small-scale Structure and Particle Properties in Saturn's Rings from Stellar and Radio Occultations Open
Saturn's rings consist of icy particles of various sizes ranging from millimeters to several meters. Particles may aggregate into ephemeral elongated clumps known as self-gravity wakes in regions where the surface mass density and epicycli…