HSTOF ENA observations and energetic ion distributions in the heliosheath

HSTOF ENA observations and energetic ion distributions in the heliosheath

Launched in 1996, HSTOF on board SOHO was the first instrument to detect the energetic neutral atoms (ENA) from the heliosheath. After mid 2003, the field of view of HSTOF was restricted to the flank sectors of the heliosheath, in which region the energetic ion distributions are still unknown. The r...

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Veröffentlicht in:Astronomy and astrophysics (Berlin) 2012-05, Vol.541, p.1-1
Hauptverfasser: Czechowski, A, Hilchenbach, M, Hsieh, K C
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creator Czechowski, A
Hilchenbach, M
Hsieh, K C
description Launched in 1996, HSTOF on board SOHO was the first instrument to detect the energetic neutral atoms (ENA) from the heliosheath. After mid 2003, the field of view of HSTOF was restricted to the flank sectors of the heliosheath, in which region the energetic ion distributions are still unknown. The researchers update the HSTOF ENA hydrogen and helium spectra by adding the results from the recent (2006-2010) measurements. They calculate the energetic ion distributions in a numerical model of the heliosheath and use them as a basis for interpreting the HSTOF ENA observations, in particular those of the flank sectors. The HSTOF ENA flux intensity is nevertheless significantly lower than the model calculations. Near the heliopause there appears a region of low energetic ion density caused by the charge-exchange and the escape losses.
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title HSTOF ENA observations and energetic ion distributions in the heliosheath
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