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Coordinated Study on Solar Wind Turbulence During the Venus-Express, ACE and Ulysses Alignment of August 2007
Orsini, S.; Baumjohann, W.; Bavassano, B. +14 more
At the end of August 2007, Venus, Earth and Ulysses were aligned within a few degrees. This unusual event gives the opportunity to attempt a coordinated study on the radial evolution of solar wind turbulence and coronal transients like CMEs between 0.7 and 1.4 AU. Interplanetary magnetic field data and moments of proton velocity distribution funct…
The Interstellar Heliopause Probe: Heliospheric Boundary Explorer Mission to the Interstellar Medium
Wimmer-Schweingruber, Robert F.; McNutt, Ralph; IHP/HEX Team
The Sun, driving a supersonic solar wind, cuts out of the local interstellar medium a giant plasma bubble, the heliosphere. ESA, jointly with NASA, has had an important role in the development of our current understanding of the Suns' immediate neighborhood. Ulysses is the only spacecraft exploring the third, out-of-ecliptic dimension, while SOHO …
The Energy Cascade in Solar Wind MHD Turbulence
Bavassano, B.; Bruno, R.; Carbone, V. +3 more
Direct evidence for the presence of an inertial energy cascade, the most characteristic signature of hydromagnetic turbulence (MHD), is observed in the solar wind by the Ulysses spacecraft. A linear relation is indeed observed for the scaling of mixed third order structure functions involving Elsässer variables. This experimental result, confirmin…
Modeling the Sporadic Meteoroid Background Cloud
Dikarev, V.; Grün, E.; Landgraf, M. +3 more
The orbital distributions of dust particles in interplanetary space are revised in the ESA meteoroid model to incorporate more observational data and to comply with the constraints due to the long-term particle dynamics under the planetary gravity and Poynting–Robertson effect. Infrared observations of the zodiacal cloud by the COBE Earth-bound ob…