SPECIAL TOPICS ESS 590
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This 18 page Class Notes was uploaded by Miss Jeanette Keebler on Wednesday September 9, 2015. The Class Notes belongs to ESS 590 at University of Washington taught by Staff in Fall. Since its upload, it has received 40 views. For similar materials see /class/192662/ess-590-university-of-washington in Earth And Space Sciences at University of Washington.
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Date Created: 09/09/15
Jupiter Aurora HST STIS WFPCZ PRC9804 ST SCI OPO January 7 1998 J Clarke University of Michigan and NASA L I 7 I1 5quot 3 I J 1 39 5 l Closure of cororation currents in the auroral zone Pulsating Xray spot 45 minute period a 39 c V v Relativistic electrons with a 1 q 40 minute intensity variations 2 o u on the dusk side high latitude Os i r pk Quasiperiodic explosive magnetic merging process E atquot i O w 33 o v 4391 3 r33 39 rquot 39339 Jo V um time n4 0 20 40 60 Brightness R Dun39ng quiet solar activity times Jupiter a stronger radio source than the Sun Aqu 115 251 if zumqu 15 2 zuuz J 31R 2e3qu 12m nun12 u 56 J JR p ux um um m 1 Emmy mm ed Y mm mm mm xmerchange events ow bursts C electrun bursts D upstream evems Processes controlling Jovian magnetosphere Jupiter magnetic field strength surface equatorial field 700000 nT Jupiter corotation rate 96 hours Internal plasma source 1 ton 51 lost from lo More than 100 known active volcanoes Torus made of 8 S 0 OH L If 3 I J 1 39 5 l Multiple Footprint Aurora Torus Alfven wing Vp W ma netic axis g 0 t be electflc current 39 I auroral zone MA 03 3 004 Ms gt 1 but fast Mach number lt 1 Io has equatorial aurora E vu Jupiter I XEu VP Sun ux tube ionospheric CLIFeM parallel trajecmry ionospheric current perpendicular Plasma Density and Flow lo s ionosphere is strongly advections dominated Plasma slowed in lo s ionosphere redirected around moon an then reaccelerated in the wake by 6RJ lonosphere has smaller density and smaller scale height on upstream side maximum density seen in the flanks 10x enhancement in wake 5x How is mass supplied to torus How is it heatedaccelerated IO SODIUM CLOUDS 15 R About 23 of iogenic material lost through Charge exchange Neutral Cloud Coid torus Neutral cloud Ne1000cm393 802 800 8 Na 8 TnTe1eV a M f a f C 39 N w I ll I Warm torus 90 of plasma Ne2000 Cm3 0 s n100ev Te5eV IO SODIUM CLOUDS 71 in lo frame Flow direction v 15 R Jet Electric fields associated with Jupiter s magnetospheric interaction with Io rip ions out of Io s collisionally thick atmosphere
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