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. 2022 May 9;218(4):28. doi: 10.1007/s11214-022-00895-2

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Fig. 8 — $H^{+}$ PUI distribution function as measured by Ulysses SWICS. Measurements were taken from 1996–2000 at $\sim 4.8 au$ from the Sun. Model fits to the PUI core (dotted curve) and suprathermal tail with slope $w^{- 5}$ yield a total distribution fit (solid curve). From Fisk and Gloeckler (2006). © AAS. Reproduced with permission