Jones, GH and Roussos, E and Krupp, N and Beckmann, U and Coates, AJ and Crary, F and Dandouras, I and Dikarev, V and Dougherty, MK and Garnier, P and Hansen, CJ and Hendrix, AR and Hospodarsky, GB and Johnson, RE and Kempf, S and Khurana, KK and Krimigis, SM and Kruger, H and Kurth, WS and Lagg, A and McAndrews, HJ and Mitchell, DG and Paranicas, C and Postberg, F and Russell, CT and Saur, J and Seiss, M and Spahn, F and Srama, R and Strobel, DF and Tokar, R and Wahlund, JE and Wilson, RJ and Woch, J and Young, D (2008) The dust halo of Saturn's largest icy moon, Rhea. SCIENCE , 319 (5868) 1380 - 1384. 10.1126/science.1151524.
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Saturn's moon Rhea had been considered massive enough to retain a thin, externally generated atmosphere capable of locally affecting Saturn's magnetosphere. The Cassini spacecraft's in situ observations reveal that energetic electrons are depleted in the moon's vicinity. The absence of a substantial exosphere implies that Rhea's magnetospheric interaction region, rather than being exclusively induced by sputtered gas and its products, likely contains solid material that can absorb magnetospheric particles. Combined observations from several instruments suggest that this material is in the form of grains and boulders up to several decimetres in size and orbits Rhea as an equatorial debris disk. Within this disk may reside denser, discrete rings or arcs of material.
|Title:||The dust halo of Saturn's largest icy moon, Rhea|
|Keywords:||PLANETARY SATELLITES, CASSINI, MAGNETOSPHERE, CLOUDS|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Space and Climate Physics|
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