The sun's gravitational quadrupole moment inferred from the fine structure of the acoustic and gravity normal mode spectra of the sun.
Abstract
The fine structure of 30 low-order, low-degree acoustic mode multiplets, the average fine structure of l = 1 and 2 intermediate-order acoustic mode multiplets, and 31 low-degree gravity mode multiplets have been analyzed to infer the internal rotation of the sun and to place upper limits on the internal magnetic fields. The inferred angular velocity distribution based explicitly on the properties of the 63 multiplets yields a gravitational quadrupole moment J2 of ≈7.7×10-6. This result has important implications for planetary tests of theories of gravitation.
- Publication:
-
Fourth Marcel Grossmann Meeting on General Relativity
- Pub Date:
- 1986
- Bibcode:
- 1986mgm..conf.1581H
- Keywords:
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- General Relativity:Solar System;
- Solar Oscillations:Solar Rotation;
- Solar Rotation:Solar Oscillations;
- Solar System:General Relativity;
- Sun:Quadrupole Moment