Auroral emissions from Uranus and Neptune.

Area of Science:

• Planetary Science
• Space Physics
• Astrophysics

Background:

• Uranus and Neptune have unique, tilted magnetic fields creating dynamic magnetospheres.
• These magnetospheres produce complex radio and ultraviolet (UV) auroral emissions.
• Current auroral data primarily relies on limited 1980s Voyager 2 flybys.

Purpose of the Study:

• To summarize current knowledge of ice giant auroral emissions.
• To highlight limitations of past observations and identify future research needs.
• To discuss implications for exoplanet magnetosphere studies.

Main Methods:

• Review of existing radio and UV auroral emission data.
• Analysis of Voyager 2 in situ and remote sensing measurements.
• Comparison of historical data with limited Hubble Space Telescope observations.

Main Results:

• Ice giant auroral emissions are complex and planet-specific.
• Voyager 2 data represents only snapshots of varying solar wind/magnetosphere interactions.
• Hubble observations revealed different auroral features than Voyager 2, indicating diverse configurations.

Conclusions:

• Further remote sensing and future orbital missions are crucial for understanding ice giant magnetospheres and auroral processes.
• Studying Uranian and Neptunian auroras offers insights into exoplanetary systems.
• More comprehensive data is needed to fully characterize these dynamic magnetospheric environments.