Gravitational multipole moments of the Sun determined from helioseismic estimates of the internal structure and rotation

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Rotation, Helioseismology

Scientific paper

We determine the gravitational multipole moments J2n, n=1,5, of the sun using a model of the interior structure and of solar rotation obtained from helioseismic inversions. The differential rotation of the convective zone and the underlying transition zone make only a small (~0.5%) contribution to the quadrupole moment J_2 which is found to have a value ~2.21x 10-7.

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