Geoscience Reference
In-Depth Information
Fig. 2. Sample of an attempt in finding the yet to be observed ACR spectrum at the
termination shock and the compression ratio of that shock by adjusting the parameters
of a model to fit the H and He neutral atoms flux observed by SoHO at 1 AU. Fitting
H and He data independently yields the same result. The shock strength found is 2.89
(figure by courtesy of A. Czechowski).
Fig. 3. Neutral H fluxes from the apex and from the anti-apex direction as measured by
HSTOF of CELIAS on SoHO are compared with a model investigating the role stochastic
acceleration of the superthermal PUI plays in HS. The numbers beside the curves refer
to different magnitudes of turbulence in the region. See text for definition. The SoHO
measurements in two opposite regions of the heliosheath are in agreement with the same
set of modeling parameters. The data points from HENA on IMAGER are upper limits
of ENA flux averaged over all directions
32
(figure by courtesy of R. Kallenbach).
