Search Publications
Time-Dependent Modulation of Cosmic Rays in the Heliosphere
Ferreira, S. E. S.; Potgieter, M. S.; Manuel, R.
The time-dependent modulation of galactic cosmic rays in the heliosphere is studied by computing intensities using a time-dependent modulation model. By introducing recent theoretical advances in the transport coefficients in the model, computed intensities are compared with Voyager 1, International Monitoring Platform (IMP) 8, and Ulysses proton …
Identification of Interplanetary Coronal Mass Ejections at Ulysses Using Multiple Solar Wind Signatures
Richardson, I. G.
Previous studies have discussed the identification of interplanetary coronal mass ejections (ICMEs) near the Earth based on various solar wind signatures. In particular, methods have been developed of identifying regions of anomalously low solar wind proton temperatures (Tp) and plasma compositional anomalies relative to the composition…
Characterization of the Turbulent Magnetic Integral Length in the Solar Wind: From 0.3 to 5 Astronomical Units
Dasso, S.; Matthaeus, W. H.; Weygand, J. M. +1 more
The solar wind is a structured and complex system, in which the fields vary strongly over a wide range of spatial and temporal scales. As an example, the turbulent activity in the wind affects the evolution in the heliosphere of the integral turbulent scale or correlation length [λ], usually associated with the breakpoint in the turbulent-energy s…
Solar Wind Electron Strahls Associated with a High-Latitude CME: Ulysses Observations
Lazar, M.; Poedts, S.; Pomoell, J. +2 more
Counterstreaming beams of electrons are ubiquitous in coronal mass ejections (CMEs) - although their existence is not unanimously accepted as a necessary and/or sufficient signature of these events. We continue the investigation of a high-latitude CME registered by the Ulysses spacecraft on 18 - 19 January 2002 (Dumitrache, Popescu, and Oncica, So…
Two-Way Frequency Fluctuations Observed During Coronal Radio Sounding Experiments
Pätzold, M.; Bird, M. K.; Efimov, A. I. +5 more
Coronal radio-sounding experiments were carried out using two-way coherent dual-frequency carrier signals of the ESA spacecraft Rosetta (ROS) in 2006. Frequency measurements recorded at both NASA and ESA tracking stations (sample rate: 1 Hz) are analyzed in this work. Spectral analysis of the S-band, X-band, and differential frequency records has …