Astronomy and Astrophysics – Astronomy
Scientific paper
May 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aas...188.5307g&link_type=abstract
American Astronomical Society, 188th AAS Meeting, #53.07; Bulletin of the American Astronomical Society, Vol. 28, p.904
Astronomy and Astrophysics
Astronomy
1
Scientific paper
The solar oscillation spectrum and the fine structure in it from the first complete month of GONG data have been used to place a limit on the Sun's internal magnetic field. The limit is consistent with the magnetic pressure being no more than 1/1000 of the gas pressure between the Sun's deep interior and its surface. This conclusion is consistent with earlier results. The GONG data are from a time near magnetic activity minimum. The effect of the near surface magnetic field on the fine structure in the oscillation spectrum reflects a perturbation of quadrupole toroidal symmetry. This geometry also dominated at the last activity minimum. The meaning of this result is discussed. The near surface magnetic perturbation is not spherically symmetric. This corrupts the results of inversions designed to probe the Sun's deep interior. The solution to this problem is presented.
Dziembowski Wojciech A.
GONG Magnetic Effects Team
Goode Philip. R.
Rhodes Elmer J.
Schou Jepser
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