On the Acceleration of Pickup He+ at 1 AU

Details On the Acceleration of Pickup He+ at 1 AU On the Acceleration of Pickup He+ at 1 AU

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsh12c..07k&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SH12C-07

Physics

2114 Energetic Particles, Heliospheric (7514), 2139 Interplanetary Shocks, 2152 Pickup Ions, 7513 Coronal Mass Ejections, 7514 Energetic Particles (2114)

Scientific paper

We investigate the variation of suprathermal He+/He2+ abundances in the energy range 85-280 keV during the years 1997 to 2001 at 1 AU, using data from the CELIAS/STOF experiment onboard SOHO. It has been shown that the He+ ions in this energy range form the suprathermal tail of accelerated pickup helium of interstellar origin. We observe a large variability of the He+ abundance ranging from He+/He2+ <5% to He+/He2+ >1. We correlate 12 hour averages of the He+ abundance at suprathermal energies for all days with significant He+ flux with solar wind parameters and find a general anti-correlation of He+ abundance with the solar wind velocity and the solar wind thermal velocity. We discuss possible causes of this variability, in particular variations of the source strength of pickup ions and solar wind alphas and variations of the acceleration efficiency for He+ and He2+.

Affiliated with

Also associated with

No associations

Rating

On the Acceleration of Pickup He+ at 1 AU does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the Acceleration of Pickup He+ at 1 AU, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Acceleration of Pickup He+ at 1 AU will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1380891