Moment Calculations for Low Energy Ions in Jupiter's Magnetotail from NASA’s NEW HORIZONS Misson

Details Moment Calculations for Low Energy Ions in Jupiter's Magnetotail from NASA’s NEW HORIZONS Misson Moment Calculations for Low Energy Ions in Jupiter's Magnetotail from NASA’s NEW HORIZONS Misson

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23b1619h&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23B-1619

Physics

[2756] Magnetospheric Physics / Planetary Magnetospheres, [6220] Planetary Sciences: Solar System Objects / Jupiter

Scientific paper

Jupiter’s magnetosphere and magnetotail is the largest cohesive structure in our solar system and extends back to the orbit of Saturn. One of NASA’s objectives is to understand how various bodies interact with their surroundings. The New Horizons (NH) mission was the first satellite to traverse axially down the Jovian magnetotail and obtain in-situ data. The Solar Wind Around Pluto (SWAP) instrument onboard NH measured low energy ions from ~35eV to 7.5 keV in the Jovian magnetotail. We analyzed SWAP data from 500-1750 Jovian radii (RJ) when the spacecraft was spinning. A 3D phase-space density fitting procedure was constructed to calculate fluid moments, such as densities, velocities, the Mach number and temperatures from which the thermal pressure can be determined in order to better understand the ion characteristics in the magnetotail. The results indicate that Jupiter’s magnetotail is a highly dynamic region with tremendous variations. This paper shows variations of moments in different spatial scales and calculation of the magnetic field at a boundary region.

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