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Are solar acoustic modes correlated?
T. Foglizzo 1,
R.A. García 1,
P. Boumier 2,
J. Charra 2,
A.H. Gabriel 2,
G. Grec 3,
J.M. Robillot 4,
T. Roca Cortés 5,
S. Turck-Chièze 1 and
R.K. Ulrich 6
Received 18 July 1997 / Accepted 17 September 1997
We have studied the statistical properties of the energy of
individual acoustic modes, extracted from 310 days of GOLF data near
the solar minimum. The exponential distribution of the energy of each
mode is clearly seen. The modes are found to be uncorrelated with a
accuracy, thus supporting the hypothesis of
stochastic excitation by the solar convection.
A simple model suggests that of the energy of each mode is coherent among the modes studied in IPHIR data, correponding to a mean correlation of .
Key words: Sun: oscillations; magnetic fields methods: analytical, statistical
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© European Southern Observatory (ESO) 1998
Online publication: January 8, 1998