NASA Logo, External Link
Facebook icon, External Link to NASA STI page on Facebook Twitter icon, External Link to NASA STI on Twitter YouTube icon, External Link to NASA STI Channel on YouTube RSS icon, External Link to New NASA STI RSS Feed AddThis share icon
 

Record Details

Record 1 of 2945
Magnetosphere, Rings, and Moons of Uranus
Offline Availability: Go to Request Form
Author and Affiliation:
Cheng, A. F.(Johns Hopkins Univ., Silver Spring, MD, United States)
Abstract: The observation of an ultraviolet aurora on Uranus implies the existence of a magnetosphere. It is suggested that the magnetospheres of Uranus and Saturn may be very similar. Charged particle sputtering of water ice surfaces on the Uranian moons may maintain an oxygen ion plasma torus similar to the heavy ion plasma torus at Saturn. Atmospheric cosmic ray albedo neutron decay may sustain an inner radiation belt with omnidirectional proton fluxes. If the 100 keV ion fluxes near 7 RU are similar to Saturnian ion fluxes at such energies, the Uranian aurora may be maintained by ion precipitation from the radiation belts at nearly the strong diffusion rate. This mechanism predicts comparable aurorae over both magnetic poles of Uranus, in contrast with the Faraday disc dynamo mechanism, which powers an aurora only over the sunlit pole of uranus. If, however, the 100 kev ion fluxes at Uranus are comparable to those at Saturn, any exposed methane ice surfaces on the moons and rings of Uranus would be quickly transformed by ion impacts to a black, carbonaceous polymer.
Publication Date: Oct 01, 1984
Document ID:
19850003643
(Acquired Nov 13, 1995)
Accession Number: 85N11951
Subject Category: LUNAR AND PLANETARY EXPLORATION
Document Type: Conference Paper
Publication Information: JPL Uranus and Neptune; p 541-556
Publisher Information: United States
Contract/Grant/Task Num: N00024-78-C-5384
Financial Sponsor: NASA; United States
Organization Source: Johns Hopkins Univ.; Silver Spring, MD, United States
Description: 16p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: AURORAS; FARADAY EFFECT; MAGNETIC POLES; MOON; PLANETARY MAGNETOSPHERES; URANUS (PLANET); URANUS RINGS; GAS GIANT PLANETS; GEOMAGNETISM; NATURAL SATELLITES; PLANETARY STRUCTURE
Imprint And Other Notes: In JPL Uranus and Neptune p 541-556 (SEE N85-11927 02-91)
› Back to Top
Find Similar Records
NASA Logo, External Link
NASA Official: Gerald Steeman
Site Curator: STI Program
Last Modified: September 12, 2014
Contact Us