Fig. 3
From: Pickup ion-mediated plasma physics of the outer heliosphere and very local interstellar medium
IBEX-Hi and IBEX-Lo ENA spectra compared with simulations based on one set of parameters considered by Zirnstein et al.—see text and Zirnstein et al. (2014) for details. Dashed green ENAs from a secondary VLISM population, forming the ribbon; dashed blue three IHS populations with Maxwellian distributions; dashed red ENAs from a hot, PUI VLISM population; solid purple superposition of all three IHS, the secondary ENAs from the ribbon, and a single completely thermalized VLISM population (not visible); solid red superposition of all three IHS, the secondary ENAs from the ribbon, and the two proton VLISM populations (Desai et al. 2014). a The left panel corresponds to observations made by IBEX in the Voyager 1 direction and b the right panel to observations made in the Voyager 2 direction