Ion Acoustic Waves in the Heliosphere
Lin, Naiguo; Kellogg, P. J.; MacDowall, R. J.; Gary, S. P.
United States
Abstract
Observations of ion acoustic waves in the solar wind during the first and second orbit of the Ulysses spacecraft are presented. The observations show variations of the wave activity with the heliolatitude and with the phase of the solar cycle. The interrelationships between the wave intensity and the electron heat flux and the ratio of electron to proton temperature, T e/T p, are examined.