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2001•Astronomy and AstrophysicsOpen access

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

I. W. Roxburgh

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Abstract

We determine the gravitational multipole moments , 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 (≈ ) contribution to the quadrupole moment J2 which is found to have a value ≈ .

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We determine the gravitational multipole moments , 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 (≈ ) contribution to the quadrupole moment J2 which is found to have a value ≈ .

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Available abstract

We determine the gravitational multipole moments , 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 (≈ ) contribution to the quadrupole moment J2 which is found to have a value ≈ .

Key concepts: Physics, Multipole expansion, Quadrupole, Helioseismology, Rotation (mathematics), Astrophysics, Differential rotation, Internal rotation

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