Stuttgart 2012 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 6: Sonne und Heliosphäre I

EP 6.1: Vortrag

Mittwoch, 14. März 2012, 14:00–14:15, V55.21

Spectral properties of ENA fluxes from the inner heliospheric source — •Mark Siewert and Hans Fahr — Argelander-Institut f. Astronomie, Universität Bonn

Fluxes of energetic neutral atoms (ENAs) that have been recently observed by the IBEX mission exhibit several unexpected properties, including a previously unmodeled region of increased intensities in the approximate shape of a ribbon, dominating energy regions above 1 keV. We present latest results from a model that produces a very similar feature, based on shock-processed ions in the PUI energy range. We also discuss spectral properties of the ENA fluxes derived from this model and compare them with IBEX observations.