Gravitational multipole moments of the Sun determined from helioseismic estimates of the internal structure and rotation
Astronomy Unit, Queen Mary, University of London, Mile End Road, London E1 4NS, UK LESIA, Observatoire de Paris, Place Jules Janssen, 92155 Meudon, France
Accepted: 31 July 2001
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 words: Sun: rotation / Sun: helioseismology
© ESO, 2001