solar wind – bow shock - magnetosheath

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Foreshock studies by MEX and VEX FAB: field-aligned beam FAB + FS: foreshock M. Yamauchi et al.

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Presentation transcript:

solar wind – bow shock - magnetosheath pickup ions reflected SW SW Bow shock Yamauchi et al., PSS (2015), doi:10.1016/j.pss.2015.09.013 Yamauchi et al., PSS (2015), doi:10.1016/j.pss.2015.08.003 Frahm et al., PSS (2016), in press, doi:10.1016/j.pss.2015.12.011

Seasonal change in newly ionized H 2-months average (TIMED/SEE observation) Strong perihelion-aphelion difference (> factor 10) of pick-up ions Perihelion@solar minimum >> Aphelion@solar maximum

Seasonal change in newly ionized H Strong perihelion-aphelion difference (> factor 10) of pick-up ions Perihelion@solar minimum >> Aphelion@solar maximum

Oxygen Foreshock

Oxygen Foreshock (mass vs. direction) O+ is accelerated by electrostatic potential Reflected H+ energy (inc direction) = O+ energy + incident SW energy

Foreshock formation in Magnetosheath

Future work along the bow shock ⇒ bow shock motion 2005-8-05 07:45 08:45 09:45 10:45

Understanding reflection: seasonal variation? relation to foreshock? relation to IMF?