Search Publications
Multispacecraft observations of the hard X-ray emission from the giant solar flare on 2003 November 4
Hurley, K.; Kane, S. R.; McTiernan, J. M.
The hard X-ray emission from the “giant” solar flare on 4 November 2003 ( 1947 UT) was observed by the hard X-ray/gamma ray spectrometer on the Ulysses spacecraft located at 114 degrees west of the Sun-Earth line at a distance of 5.28 AU from the Sun. A “small” hard X-ray burst during the early rise of the giant flare and a part of the decay of th…
On the "injection problem" at the solar wind termination shock
Hilchenbach, M.; Kallenbach, R.; Bamert, K. +2 more
This article presents an integrated analytical model on the injection efficiencies of the different ion species of the Anomalous component of the Cosmic Rays (ACRs) at the solar wind termination shock. We find that the injection into diffusive (first-order Fermi) acceleration is dominated by parallel ion diffusion and not by perpendicular diffusio…
Proton and electron acceleration by quasi-perpendicular fast magnetosonic shocks in interplanetary space
Simnett, G. M.; Forsyth, R. J.; Sakai, J. -I.
Recent observations from the Ulysses spacecraft (Simnett 2003, Sol. Phys., 213, 387) have measured the energy spectrum of the ambient ions associated with the passage of a fast magnetosonic quasi-perpendicular shock driven by a coronal mass ejection (CME). Near the shock front the energy spectrum of the accelerated ions, which are predominantly pr…
Nonradial and nonpolytropic astrophysical outflows. VII. Fitting ULYSSES solar wind data during minimum
Tsinganos, K.; Iro, N.; Lima, J. J. G. +1 more
Exact axisymmetric analytical solutions of the governing MHD equations for magnetized and rotating outflows are applied to the solar wind during solar minimum as observed by ULYSSES. Using the spacecraft data, the latitudinal dependences of physical quantities such as the density, velocity, magnetic field and temperature are analytically described…