The problem of the oxygen presence in the heliosphere and observational implications

Details The problem of the oxygen presence in the heliosphere and observational implications The problem of the oxygen presence in the heliosphere and observational implications

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991esasp.317..349f&link_type=abstract

In ESA, 10th ESA Symposium on European Rocket and Balloon Programmes and Related Research p 349-354 (SEE N92-24589 15-12)

Computer Science

Sound

Heliosphere, Interstellar Gas, Oxygen, Resonance, Sounding Rockets, Interplanetary Space, Interstellar Matter, Plasma Physics

Scientific paper

Due to the relative motion of the solar system with respect to the ambient interstellar medium (VLISM) neutral atomic VLISM gases can pass over the plasma interface region ahead of the solar system and can enter into the inner heliosphere, however, only after having suffered changes in their dynamic and thermodynamic properties. VLISM oxygen especially is subject to strong charge exchange loss processes, uncompensated by corresponding gain processes, before it enters the inner heliosphere. Thus, the presence of VLISM oxygen in interplanetary space is crucial for the type of plasma interface ahead of the solar system which sensitively determine the net oxygen inflow. It is proposed to observe the interplanetary oxygen resonance glow intensity at 1304 A with a rocket or Space Shuttle-borne experiment in order to clarify the nature of this interface. For this purpose, detector sensitivities enabling a positive detection of intensities down to 0.001 Rayleighs are required. These sensitivities are reached by an instrument called Hitch-Helly which is developed for a forthcoming Hitchhiker flight.

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