Search Publications
Signatures of kinetic instabilities in the solar wind
Landi, Simone; Hellinger, Petr; Velli, Marco +3 more
An analysis of ion non-thermal properties in the fast solar wind based on Ulysses data is reported. The radial evolution of the main proton moments (density, temperature, and drift velocities) and their empirical correlations with other plasma parameters are investigated in detail and compared with theoretical expectations. The stability of the pl…
Heliolatitudinal and time variations of the solar wind mass flux: Inferences from the backscattered solar Lyman-alpha intensity maps
Quemerais, E.; Sokół, J. M.; Katushkina, O. A. +1 more
Recently Sokół et al. (2012) have presented a reconstruction of heliolatitudinal and time variations of the solar wind speed and density. Method of the reconstruction was based on the following: (i) measurements of the interplanetary scintillations, (ii) OMNI-2 solar wind data in the ecliptic plane, and (iii) Ulysses solar wind data out of the ecl…
Association of solar wind proton flux extremes with pseudostreamers
Zhao, L.; Fisk, L. A.; Gibson, S. E.
We investigate the characteristics and solar origins of a subpopulation of the solar wind that possesses extreme values of proton flux. Ulysses observations including solar wind magnetic flux, proton flux, number density and velocity, and ionic composition are examined in this study. We find that the departures of solar wind proton flux from its c…
Radial evolution of the three-dimensional structure in CIRs between Earth and Ulysses
Desai, M. I.; Broiles, T. W.; Lee, C. O. +1 more
The radial alignment of ACE and Ulysses in February 2004 and August 2007 provided us with unprecedented opportunities to study the radial evolution of planar magnetic structures (PMSs) in three corotating interaction regions (CIRs). The in situ observations are compared with results from an analytical and a numerical model of CIRs. We find that (1…
Ulysses observations of Jupiter's 10 h modulation in interplanetary space in 2004
Heber, B.; Kopp, A.; Dunzlaff, P.
Since the Pioneer 10/11 mission, Jupiter is known as a dominant and almost constant source of MeV electrons in the inner heliosphere. An interesting feature of the Jovian electron source is the fact that Jupiter's rotation period (~10 h) can frequently be recovered in the energy spectrum of Jovian electrons in the vicinity of the planet. However, …