Discovery of Solar Wind Low Energy Neutral Atoms
LENA imager routinely sees signal in sectors including or closest to sun direction.
Signal increases when a CME arrives at the magnetosphere.
SOHO EUV observations show no related variation of solar EUV.
Conclusion: fast neutral atoms from solar wind interaction with interplanetary and geocoronal gas.
Simulations corroborate interpretation (next page).
- Spinogram shows time evolution with CME arrival at 09:15.
- Arrows indicate timing of snapshot features.
90 degrees wide, 360 degrees high