Other
Scientific paper
Feb 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.517..155n&link_type=abstract
In: Proceedings of SOHO 12 / GONG+ 2002. Local and global helioseismology: the present and future, 27 October - 1 November 2002,
Other
2
Helioseismology, Asteroseismology
Scientific paper
In the framework of asteroseismology, it would be useful to assess the situation in theoretical understanding and prediction of acoustic modes of the Sun, to better estimate the reliability we can expect when studying other stars. Available precise seismology calculations have given many useful informations concerning the solar interior. One can nevertheless note that at large frequencies, analytical and numerical calculations are in very good agreement while being different to observational data up to tens or hundreds of microHz. At low frequencies in contrast, numerical results remarkably agree with observations while analytical results are substantially different, especially for low degree modes. I try to address these problems by proposing a slightly revisited understanding of acoustic eigenfrequencies, based on the concept of acoustic waves in a locally homogeneous environment. The deduced local wave formalism can better conciliate the numerical-analytical-observational results in the major range of frequencies, while proposing a diagnostic for the Sun surface. These results can be useful for seismology of Sun-like or intermediate-mass stars where a acoustic- and gravity-mode regions are well separated in frequency.
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