Velocity and abundance of silicon ions in the solar wind

Details Velocity and abundance of silicon ions in the solar wind Velocity and abundance of silicon ions in the solar wind

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....94.2365b&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, March 1, 1989, p. 2365-2373. Research supported by SNSF.

Other

26

Ion Motion, Plasma Composition, Silicon, Solar Wind, Space Plasmas, Abundance, Helium Ions, International Sun Earth Explorer 3, Propagation Velocity

Scientific paper

Using data from the ISEE-3 ion composition instrument (ICI), velocities and abundances of silicon ions in the solar wind have been determined. The period of investigation covers the maximum of solar cycle 21, beginning with launch of ISEE-3 in August 1978 and ending at the removal of the spacecraft from the Lagrangian Point L1 in June 1982. The results generally confirm previous ICI observations of iron, the other heavy element with a low first ionization potential measured with the ICI Silicon ions (and other ions in the same M/Q range) tend to stream at the bulk velocity of He-4(2+) in the low-speed solar wind. At high-speed solar wind, Si lags by up to or about 20 km/s after He-4(2+). By means of a minimum variance estimation technique, fluxes (and densities) of silicon in the solar wind have been obtained free of bias. An average Si/O flux ratio of 0.19 + or - 0.04 is derived. This value is larger by a factor of 3 or 4 than the Si/O abundance ratio at the solar surface.

Affiliated with

Also associated with

No associations

Rating

Velocity and abundance of silicon ions in the solar wind 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 Velocity and abundance of silicon ions in the solar wind, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Velocity and abundance of silicon ions in the solar wind will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1804351