N Krupp A Lagg E C Roelof J

Outline Flow pattern from energetic particle measurements Previous results from Galileo Update on the

Missions to Jupiter Magnetosphere Coverage seven flyby missions: P 10, P 11, V 2,

Energetic particle measurements along Galileo trajectory 1996 -2003 equatorial plane north-south plane EGU 2008

Fast Rotator theme Huge magnetized system in fast rotation: - Tspin=9. 9 h -

Flow pattern from energetic particle measurements Intensity Anisotropy EGU 2008 -A-07240 EGU 2008, Vienna,

Global Flow Pattern · plasma flow rotational driven Vasyliunas, 1983 · formation of a

Global particle flow pattern in Jupiter’s magnetosphere First order approximation Galileo/EPD measurements in equatorial

Previous results from Galileo Woch et al. , ASR 2004 EGU 2008 -A-07240 EGU

Previous results from Galileo Frank and Paterson, JGR 2002 EGU 2008 -A-07240 EGU 2008,

Global particle flow pattern in Jupiter’s magnetosphere Galileo/EPD measurements in equatorial plane EGU 2008

Local time dependence of the flow pattern at Jupiter EGU 2008 -A-07240 EGU 2008,

Impact on models Cowley and Bunce PSS, 2003 EGU 2008 -A-07240 EGU 2008, Vienna,

realistic flow profiles at different local times EGU 2008 -A-07240 EGU 2008, Vienna, April

Global particle flow pattern in Jupiter’s magnetosphere Galileo/EPD measurements in equatorial plane tailward disruptions

Particle flow bursts Ion bursts in the distant tail · field-aligned / radial outward

Jovian Magnetotail Dynamics - Particle Flow Bursts / Auroral Emissions Galileo PWS measurements show:

MHD simulation of Jupiter’s magnetosphere Fukazawa, 2004 EGU 2008 -A-07240 EGU 2008, Vienna, April

Plasmoids in the deep magnetotail of Jupiter New Horizons results Mc. Comas et al.

Dynamics of the Jovian magnetotail energetic particle flow bursts and magnetospheric response 16 days

Summary and open questions • Jupiter’s magnetosphere sub-corotates on average out to 150 RJ

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N. Krupp, A. Lagg, E. C. Roelof, J. Woch, K. K. Khurana Global flows of energetic ions in the Jovian magnetosphere: Galileo EPD measurements 1996 -2003 EGU 2008 -A-07240 EGU General Assembly 2008, Vienna April 14 -18, 2008 Norbert Krupp Max-Planck-Institut für Sonnensystemforschung Katlenburg-Lindau, Germany EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Outline Flow pattern from energetic particle measurements Previous results from Galileo Update on the global flow results Conclusions Summary EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Missions to Jupiter Magnetosphere Coverage seven flyby missions: P 10, P 11, V 2, ULS, Cassini, New Horizons one orbiter: Galileo • allowed us to derive global flow pattern, which is of fundamental importance for understanding the Jovian system • Information limited to equatorial plane and 150 RJ EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 NH Norbert Krupp et al.

Energetic particle measurements along Galileo trajectory 1996 -2003 equatorial plane north-south plane EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Fast Rotator theme Huge magnetized system in fast rotation: - Tspin=9. 9 h - Magnetic moment ~ 600 Earth’s one (not very different from a pulsar !) - Bsurf ~ 430 µT - Distance of subsolar point ~ 30 Rj (~50 times Earth’s case) A magnetosphere completely dominated by rotation Distance of stagnation point (Wp B 0 Rp 3/Econv)1/2 with Econv ~0. 1 VSW EIMF larger than distance of subsolar point. EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Flow pattern from energetic particle measurements Intensity Anisotropy EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Global Flow Pattern · plasma flow rotational driven Vasyliunas, 1983 · formation of a magnetic x-line due to internal processes EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Global particle flow pattern in Jupiter’s magnetosphere First order approximation Galileo/EPD measurements in equatorial plane • (sub)-corotational flow out to 150 RJ • dawn-dusk asymmetry with smaller velocities at dusk • radial (tailward) disruptions of flow pattern in predawn and midnight sector Krupp et al, JGR 2001 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Previous results from Galileo Woch et al. , ASR 2004 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Previous results from Galileo Frank and Paterson, JGR 2002 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Global particle flow pattern in Jupiter’s magnetosphere Galileo/EPD measurements in equatorial plane EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Local time dependence of the flow pattern at Jupiter EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Impact on models Cowley and Bunce PSS, 2003 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

realistic flow profiles at different local times EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Global particle flow pattern in Jupiter’s magnetosphere Galileo/EPD measurements in equatorial plane tailward disruptions of corotational flow pattern EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Particle flow bursts Ion bursts in the distant tail · field-aligned / radial outward (inward) · periodicity of ~ 3 days Krupp et al. , 1998 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Jovian Magnetotail Dynamics - Particle Flow Bursts / Auroral Emissions Galileo PWS measurements show: particle flow bursts are associated with radio wave emissions, which are modulated with the same periodicity ion intensity · increased power at higher frequencies (> 500 k. Hz, AKR), related to auroral activity · onset of b-KOM (~ 100 k. Hz) emissions, also of auroral origin · drop in the lower cut-off frequency of the continuum (close to local plasma frequency) Þmodifications in the plasma sheet configuration (lobe encounters) out radial anisotropy in auroral emissions Louarn et al. Woch et al. Krupp et al. EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

MHD simulation of Jupiter’s magnetosphere Fukazawa, 2004 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Plasmoids in the deep magnetotail of Jupiter New Horizons results Mc. Comas et al. , 2007 EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Dynamics of the Jovian magnetotail energetic particle flow bursts and magnetospheric response 16 days 3 days radial azimuthal directional ion anisotropy northsouth magnetic field Location: 90 -113 Rj Kronberg, 2007 Kronberg, 2005 Woch, 1998 energy spectra Louarn, 2001 Krupp, 1998 variations Krupp et al, 2004 lin Xe Jupiter More outward bursts Sun More inward bursts Transient periodical disturbances ? ? Ma gn eto pa us e EGU 2008 -A-07240 with repetition period of several days are observed in the Jovian magnetotail! EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.

Summary and open questions • Jupiter’s magnetosphere sub-corotates on average out to 150 RJ in the magnetotail • dawn-dusk asymmetry inside 40 -50 RJ with smaller velocities at dusk (correlated to thickness of plasma sheet and diffuse vs. discrete aurora) • radial (tailward) periodic disruptions of flow pattern in predawn and midnight sector. Released plasmoids observed down the magnetotail out to > 2500 RJ • Stagnated flow signatures in afternoon magnetosphere • Galileo measurements restricted to equatorial plane. How does the high-latitude magnetosphere look like? JUNO EGU 2008 -A-07240 EGU 2008, Vienna, April 14, 2008 Norbert Krupp et al.