The Ice Giant Systems Seminar Series discusses recent developments in topics related to the Ice Giant systems.
Each seminar will host a guest speaker, followed by a lively discussion and community updates & news.
Events are held on the second Tuesday of the month at 11:00 AM ET.
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Upcoming Events
October 10, 2023 11:00 - 12:00 EDT
New insights into the Uranian magnetosphere: Implications for system-wide coupling
Presenter: Dr. Ian Cohen (JHU/APL)
Uranus's magnetosphere presents a compelling scientific target and provides a unique opportunity to test current understanding of multiple aspects of magnetospheric dynamics. This presentation reviews a set of new results that provide new insights into the dynamics of the Uranian magnetosphere and their implications for its coupling to the planet, the satellites, and the solar wind. A fresh survey of energetic particle observations from the Low Energy Charged Particle (LECP) instrument on Voyager 2 has revealed a surprisingly localized source of energetic particles in the region between the moons Miranda and Ariel. In reviewing potential sources, the most likely conclusion was that these particles are originating from either sputtering or activity on one or both of the moons. A new simple, yet valuable and illustrative model of Uranus' offset, tilted, and rapidly-spinning magnetic field and magnetopause was developed to investigate details of the seasonal and interplanetary magnetic field (IMF) orientation dependencies of dayside and flank reconnection along the Uranian magnetopause. The active and continuous driving of the Uranian magnetosphere observed should result in constant loading and unloading of the Uranian magnetotail, which may be further complicated and destabilized by sudden changes in the IMF orientation and solar wind conditions plus the reconfigurations from the rotation of Uranus itself. Our simple model also maps signatures of dayside and flank reconnection down to the Uranian ionosphere, as a function of planetary latitude and longitude. Uranus's rapid rotation and unique global magnetospheric convection should be consistent with both fueling of the surprisingly intense trapped radiation environment and the very low plasma densities observed by Voyager 2. These hypotheses can be tested with further work involving more advanced models, new auroral observations, and unprecedented missions to explore the in-situ environment from orbit around Uranus.
Questions? mallory.kinczyk@jhuapl.edu
Related Documents:
November 14, 2023 11:00 - 12:00 EST
Coaccretion and Giant-impact Origin of the Uranus System: Tilting Impact
Presenter: Dr. Raluca Rufu (SwRI)
Questions? Mallory.Kinczyk@jhuapl.edu
Related Documents:
January 9, 2024 11:00 - 12:00 EST
A Brief Description of the JPL Uranian Radiation Model (UMOD)
Presenter: Dr. Henry Garrett & Insoo Jun (Caltech/NASA JPL)
This talk describes a comprehensive radiation model (UMOD) of the Uranian environment for JPL mission planning. It defines the high energy electron (0.022-2.5 MeV) and proton (0.028-3.5 MeV) flux environments and the magnetic field at Uranus that can be used for spacecraft or instrument design. The data are based on the Voyager 2 Cosmic Ray Subsystem Electron Telescope and the Applied Physics Laboratory Low Energy Charged Particle Detector. B-L coordinates are for the Q3 magnetic field model. The model (as are models for Jupiter, Saturn, and Neptune) is available on-line and as a compiled version from JPL.
Questions? Jodi.Berdis@jhhuapl.edu
Related Documents:
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