Gw. Hoogeveen et P. Riley, THE SEARCH FOR SOLAR GRAVITY-MODE OSCILLATIONS IN THE SOLAR-WIND USING ULYSSES PLASMA DATA, Solar physics, 179(1), 1998, pp. 167-177
A recent report that energetic particles measured in the solar wind ma
y be influenced by solar gravity-mode (g-mode) oscillations motivated
the search for g-mode signatures in the Ulysses solar wind plasma data
. Ulysses solar wind plasma data from 1 March 1992 through the 12 Apri
l 1996 were examined in this study for signs of possible solar oscilla
tions. The multi-taper method for spectral analysis was used to look f
or significant spectral peaks in the entire four-year data set, as wel
l as in the smaller, more heliographically homogenous data set over th
e solar poles. Several frequencies satisfying certain significance req
uirements were found in the g-mode frequency range in both data sets t
hat also agree with the previously published findings. However, these
identifications are shown to be false detections, and hence the freque
ncies found cannot be identified as solar g modes.