Search Publications
Modulation of galactic and anomalous cosmic rays in the inner heliosphere
Heber, B.
Our knowledge on how galactic and anomalous cosmic rays are modulated in the inner heliosphere has been dramatically enlarged due to measurements provided by several missions launched in the past ten years. The current paradigma of singly charged anomalous cosmic rays has been confirmed by recent measurements from the SAMPEX and ACE satelite. Ulys…
The transport of energetic particles and cosmic rays in the heliosphere
Giacalone, J.; Jokipii, J. R.
We discuss recent observations of energetic particles and cosmic rays lending insight into how these particles are influenced by the interplanetary magnetic field and what can be learned about the field itself by using the energetic particles as probes. Two recent observations on which we focus attention are those by Ulysses at high heliographic l…
Propagation of 3-10 MeV electrons in the inner heliosphere: Ulysses observations
Kunow, H.; Heber, B.; Ferrando, P. +3 more
Since the 1970's electrons in the MeV energy range, of Jovian origin, have been extensively studied near the ecliptic from close to the Sun to beyond the Kronian orbit. The Ulysses trajectory provides a unique opportunity to study the propagation of several MeV electrons in a wide range of heliographic latitudes. From the Ulysses launch up to the …
Energetic ion (>∼50keV) and electron (>∼40keV) bursts observed by Ulysses near Jupiter
Anagnostopoulos, G. C.; Karanikola, I.; Marhavilas, P. K. +1 more
A careful analysis of data collected by the HISCALE experiment on board Ulysses suggests that the quasi-periodic (QP) modulation of several or tens of minutes in flux and/or anisotropy/spectral observations is an almost permanent characteristic of the energetic (>∼50 keV) ion population in the outer and the high latitude middle magnetosphere of…
Alfvén waves, magnetic decreases, and discontinuities in interplanetary space
Balogh, A.; Tsurutani, B. T.; Smith, E. J. +3 more
The Ulysses mission goes to the polar regions of the heliosphere and therefore is an ideal mission to study Alfvén waves and discontinuities. The polar region is dominated by a high speed solar wind with embedded outwardly propagating nonlinear (|Δ B|/ B0 ∼ 1 to 2) Alfvén waves. Rotational discontinuities are detected at the edges of Al…
ULF wave observations in Jupiter's magnetosphere
Dougherty, Michele K.; Petkaki, Panagiota
In previous work we have examined magnetometer data from the Ulysses Jupiter flyby, and in particular middle magnetosphere observations in the vicinity of the magnetodisk. Waves transverse to the background magnetic field were found in the heavy ion gyrofrequency regime, a signature of Ion Cyclotron (IC) waves. We examined the dayside and high lat…
Perpendicular transport of charged particles in the heliosphere
Erdős, G.; Németh, Z.
We investigate spatial fractal structures of the Heliospheric Magnetic Field, using Ulysses magnetic field data. Fractal parameters of these structures are determined during the first off-ecliptic orbit of Ulysses. We construct a model magnetic field, which shows similar fractal characteristics than the magnetic field measurements. In the model fi…