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Kinetic parameters of interstellar neutral helium: updated results from the ULYSSES/GAS-instrument
Rosenbauer, H.; Witte, M.; Banaszkiewicz, M. +1 more
The GAS-instrument onboard the space probe ULYSSES (ULS) is designed to measure the local angular distribution of the flow of interstellar neutral He-atoms within ≈3 AU distance from the sun; it allows to infer the kinetic parameters (velocity vector, temperature and density) of these particles outside the heliosphere ("at infinity"). Around the s…
Composition of the local interstellar medium as diagnosed with pickup ions
Gloeckler, George; Geiss, Johannes
Pickup ions provide us with a powerful tool to probe remote regions in and beyond the heliosphere and determine the composition of the neutral gas in these regions. Interstellar pickup ions, observed inside the heliosphere at 3-5 AU from the Sun, are created by charge exchange and photoionization of the local interstellar gas that penetrates deep …
The origin of the slow solar wind in coronal streamers
Ofman, L.
The highly variable slow solar wind has been associated with low-latitude regions of the heliosphere most clearly by the Ulysses spacecraft. Although, it is evident today that the slow solar wind originates in coronal helmet streamers, the mechanism of the slow solar wind acceleration, and the origin of the variability are still being debated. The…