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Warm Breeze from the Starboard Bow: a New Population of Neutral Helium in the Heliosphere
Wurz, P.; McComas, D. J.; Fuselier, S. A. +9 more
We investigate the signals from neutral helium atoms observed in situ from Earth orbit in 2010 by the Interstellar Boundary Explorer (IBEX). The full helium signal observed during the 2010 observation season can be explained as a superposition of pristine neutral interstellar He gas and an additional population of neutral helium that we call the W…
Solar Photoionization Rates for Interstellar Neutrals in the Inner Heliosphere: H, He, O, and Ne
Bochsler, P.; Kucharek, H.; Möbius, E. +4 more
Extreme UV (EUV) spectra from the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED)/Solar EUV Experiment are used to infer photoionization rates in the inner heliosphere. Relating these rates to various proxies describing the solar EUV radiation, we construct a multi-linear model which allows us to extrapolate ionization rates bac…