The p-mode Fourier spectrum from GOLF,
using a 690-day time series of calibrated velocity signal,
which exhibits an excellent signal to noise ratio:
Just a slice (a l=2 and a l=0 mode) from above
spectrum, showing the
complicated structures of the modes due to stochastic excitation (hiding
their fine structure due to the Sun's rotation despite the
excellent frequency resolution of 17nHz):
The low-frequency range of the p modes
from above spectrum, showing low-n order modes:
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GOLF Principal Investigator: Alan Gabriel - gabriel@medoc-ias.u-psud.fr
Web curators: Frédéric Baudin - baudin@medoc-ias.u-psud.fr and Patrick Boumier - boumier@medoc-ias.u-psud.fr