3. Quasi-periodic (~40 min) emission from the poles of Jupiter as the principal source of the extended energetic particle high latitude magnetopause boundary layer

Details 3. Quasi-periodic (~40 min) emission from the poles of Jupiter as the principal source of the extended energetic particle high latitude magnetopause boundary layer 3. Quasi-periodic (~40 min) emission from the poles of Jupiter as the principal source of the extended energetic particle high latitude magnetopause boundary layer

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja....13954k&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #13954

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Scientific paper

In this study we concentrate on the examination of flux-time profiles of energetic protons with energies 0.5-1.6 MeV along with relativistic electrons E>˜16 MeV obtain by two different experiments onboard Ulysses, HISCALE and COSPIN, from 15:00UT on day 41 up to 12:00UT on day 43. During this time interval a distinct change in the flux and the spectral observations reveals the transition of Ulysses to another characteristic region of enhanced fluxes, in the high latitude outer magnetosphere. A careful analysis of the fluxes and the anisotropy and spectral indices suggests that the quasi-periodic ˜40 min (QP-40) energetic particle bursts is an almost permanent phenomenon in the high latitude outer magnetosphere. The QP-40 modulation was confirmed by applying Singular Spectrum (SSA) and Fourier Analysis on the reconstructed signal via SSA technique. Furthermore, the QP-40 min bursts were identified as field-aligned beams originated from the South Pole. We infer that the QP 40 particle emission was the principal source of the large scale high latitude magnetopause boundary layer during Ulysses flyby of Jupiter.

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