Update on Voyager 2 High Energy Ions in the Outer Heliosphere and Heliosheath

Details Update on Voyager 2 High Energy Ions in the Outer Heliosphere and Heliosheath Update on Voyager 2 High Energy Ions in the Outer Heliosphere and Heliosheath

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh21a1808i&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH21A-1808

Physics

[2124] Interplanetary Physics / Heliopause And Solar Wind Termination, [2126] Interplanetary Physics / Heliosphere/Interstellar Medium Interactions, [2152] Interplanetary Physics / Pickup Ions, [2164] Interplanetary Physics / Solar Wind Plasma

Scientific paper

We continue to investigate the High Energy Ions (HEIs) we first reported in Intriligator et al., JGR (2010). These elevated HEI detections are found in the Voyager 2 (V2) PLS (Plasma Subsystem) data on the sunward facing B-Cup at the energy/unit charge (E/Q) step 12 corresponding to 1610 volts and a proton speed of ~ 600 km/s. We associated the V2 HEI detections in 2007 with V2 being in the vicinity of the termination shock. In the present paper we update our findings and present V2 data from other periods of interest including 2004 when V2 was measuring the effects from the October-November (Halloween) 2003 solar events; and 2008/9 when V2 was in the heliosheath. We believe that it is possible to see the link between solar activity and HEI detections in the V2 data from 2004. At solar minimum when V2 was in the heliosheath, we see almost no such HEI detections. We put the V2 HEI PLS data in the context of the simultaneous V2 PLS convective bulk plasma flow data, and the simultaneous V2 data from other experiments including the cosmic ray subsystem (CRS), the low energy charged particle (LECP), and the magnetic field. Our results suggest that the V2 HEI detections are the result of one or more underlying physical phenomena that we shall discuss.

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