Excitation of Solar Acoustic Modes

Pérez, I.; Roca-Cortés, T.; GOLF Team
Bibliographical reference

Romanian Astronomical Journal, Vol. 9, Supplement, p.141

Advertised on:
0
1999
Number of authors
3
IAC number of authors
1
Citations
0
Refereed citations
0
Description
The excitation of p-modes seems to be produced by turbulence in the convection zone (see, e.g., Kumar, 1997 and the references therein). Low-degree p-mode allowed a study of the energy distribution of the p-mode oscillations, concluding that it is of Boltzmann type (Elsworth et al., 1995; Chaplin et al., 1997). Moreover, these authors suggest that the observed distribution has the property that the high energy events exceed the Boltzmann value, wondering whether this property could have a cause other than stochastic excitation by turbulence. Amongst these, there can be: (a) an artifact due to its very small frequency resolution (? 28 ?Hz ? 10 hours), or (b) some other occasional energy release due to high energy magnetic events. In this work, the energetic distribution of the observed p-mode peaks is studied, having the posibility of using a higher (several) frequency resolution on the basis of the data collected by GOLF, onboard SOHO.