Search Publications
Determination of interstellar pickup ion distributions in the solar wind with SOHO and Cluster
Möbius, E.; Lee, M. A.; Rucinski, D. +1 more
Over the last 10 years, the experimental basis for the study of the local interstellar medium has been substantially enhanced by the direct detection of interstellar pickup ions and of interstellar neutral helium within the heliosphere. Pickup ions can be studied for a wide range of interstellar species. However, currently the accuracy of the meth…
ULYSSES observations of energetic particle acceleration and the superposed CME and CIR events of November 1992
Forsyth, R. J.; Keppler, E.; Kunow, H. +4 more
During November 1992, a series of forward and reverse shocks passed the ULYSSES spacecraft. Spectral and anisotropy measurements are reported for protons and alpha particles between 0.28 and 6 MeV observed by the Energetic Particle Composition Experiment, data recorded by the Magnetometer Experiment and the high-energy (2.7-300 MeV) proton data fr…
Recurrent variations of anomalous oxygen in association with a corotating interaction region
Fränz, M.; Keppler, E.; Reuss, M. K.
The fluxes of anomalous oxygen (E ranging from 3.5-6.8 MeV/amu), as measured by the EPAC instrument on ULYSSES, show a recurrent variation with the solar rotation period, which is anticorrelated with the fluxes of particles accelerated at the shocks of a corotating interaction region (CIR), and correlated with the fluxes of galactic cosmic rays kn…
Performance of ERNE in particle flux anisotropy measurement
Valtonen, E.; Lumme, M.; Riihonen, E. +3 more
The HED particle detector of the ERNE experiment to be flown on the SOHO spacecraft is unique compared to the earlier space-born detectors in its high directional resolution (better than 2°, depending on the track inclination). Despite the fixed view cone due to the three-axis stabilization of the spacecraft, the good angular and temporal resoluti…
Energetic particle investigation using the ERNE instrument
Vainio, R.; Valtonen, E.; Eronen, T. +9 more
During solar flares and coronal mass ejections, nuclei and electrons accelerated to high energies are injected into interplanetary space. These accelerated particles can be detected at the SOHO satellite by the ERNE instrument. From the data produced by the instrument, it is possible to identify the particles and to calculate their energy and dire…