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Title: New Dust Belts of Uranus: One Ring, Two Ring, Red Ring, Blue Ring

We compare near-infrared observations of the recently discovered outer rings of Uranus with HST results. We find that the inner ring, R/2003 U 2, is red, whereas the outer ring, R/2003 U 1, is very blue. Blue is an unusual color for rings; Saturn's enigmatic E ring is the only other known example. By analogy to the E ring, R/2003 U 1 is probably produced via impacts into the embedded moon Mab, which apparently orbits at a location where non-gravitational perturbations favor the survival and spreading of sub-micron sized dust. R/2003 U 2 more closely resembles Saturn's G ring.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
957162
Report Number(s):
UCRL-JRNL-218647
Journal ID: ISSN 0193-4511; SCEHDK; TRN: US201007%%585
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Science, vol. 312, no. 5770, April 1, 2006, pp. 92-94; Journal Volume: 312; Journal Issue: 5770
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUMM MECHANICS, GENERAL PHYSICS; COLOR; DUSTS; MOON; URANUS PLANET