The GAS-instrument onboard the space probe Ulysses is designed to measure the local
angular distribution of the flow of interstellar neutral He-atoms within≈ 3 AU distance from …

Interstellar pickup ions are an ubiquitous and thermodynamically important component of
the solar wind plasma in the heliosphere. These PUIs are born from the ionization of the …

Neutral atom imaging of the interstellar gas flow in the inner heliosphere provides the most
detailed information on physical conditions of the surrounding interstellar medium (ISM) and …

Because of its high ionization potential and weak interaction with hydrogen, neutral
interstellar helium (NISHe) is almost unaffected at the heliospheric interface with the …

A coordinated effort to combine all three methods that are used to determine the physical
parameters of interstellar gas in the heliosphere has been undertaken. In order to arrive at a …

We report the results of a comprehensive reanalysis of Ulysses observations of interstellar
He atoms flowing through the solar system, the goal being to reassess the interstellar He …

The helium gravitational focusing cone has been observed using pickup He+, first during the
solar minimum in 1984–1985 with the AMPTE/IRM spacecraft, and again in more detail from …

Aims. We study the EUV/soft X-ray emission generated by charge transfer between solar
wind heavy ions and interstellar neutral atoms and variations of the X-ray intensities and …

Solar wind charge-exchange (SWCX) emission is present in every X-ray observation of an
astrophysical object. The emission is problematic when one cannot remove the foreground …

Solar ionizing factors are responsible for modulation of interstellar neutral gas and its
derivative populations inside the heliosphere. We provide an overview of the current state of …