Detecting individual gravity modes in the Sun

Details Detecting individual gravity modes in the Sun Detecting individual gravity modes in the Sun

2009-11-30

arxiv.org/abs/0911.5442v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Proc. HELAS Workshop on `New insights into the Sun', eds M. Cunha, M. Thompson

Scientific paper

Many questions are still open regarding the structure and the dynamics of the solar core. By constraining more this region in the solar evolution models, we can reduce the incertitudes on some physical processes and on momentum transport mechanisms. A first big step was made with the detection of the signature of the dipole-gravity modes in the Sun, giving a hint of a faster rotation rate inside the core. A deeper analysis of the GOLF/SoHO data unveils the presence of a pattern of peaks that could be interpreted as dipole gravity modes. In that case, those modes can be characterized, thus bringing better constraints on the rotation of the core as well as some structural parameters such as the density at these very deep layers of the Sun interior.

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