Are solar acoustic modes correlated?

Bibcode
1998A&A...330..341F
Foglizzo, T.; Garcia, R. A.; Boumier, P.; Charra, J.; Gabriel, A. H.; Grec, G.; Robillot, J. M.; Roca-Cortés, T.; Turck-Chieze, S.; Ulrich, R. K.
Bibliographical reference

Astronomy and Astrophysics, v.330, p.341-350 (1998)

Advertised on:
2
1998
Journal
Astronomy and Astrophysics
Number of authors
10
IAC number of authors
1
Citations
28
Refereed citations
17
Description
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 partial 0.6% accuracy, thus supporting the hypothesis of stochastic excitation by the solar convection. Nevertheless, the same analysis performed on the same modes just before the solar maximum, using IPHIR data, rejects the hypothesis of no correlation at a 99.3% confidence level. A simple model suggests that 31.3partialm 9.4% of the energy of each mode is coherent among the modes studied in IPHIR data, correponding to a mean correlation of 10.7partialm 5.9%.
Type
Refereed
Magnetic fields
Methods

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