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Science 6 September 1985:
Vol. 229. no. 4717, pp. 923 - 931
DOI: 10.1126/science.229.4717.923
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Articles

Seismology of the Sun

Jørgen Christensen-Dalsgaard 1, Douglas Gough 2, and Juri Toomre 3

1 Lecturer in astronomy at the Astronomisk Institut, Aarhus Universitet, DK 8000 Aarhus C, Denmark, and a research associate at NORDITA, Copenhagen, Denmark.
2 Lecturer in astronomy and applied mathematics at the Institute of Astronomy and the Department of Applied Mathematics and Theoretical Physics, University of Cambridge, Cambridge CB3 OHA, England.
3 Professor in the Department of Astrophysical, Planetary, and Atmospheric Sciences and a fellow of the Joint Institute for Laboratory Astrophysics, University of Colorado, Boulder, Colorado 80309.

Oscillations of the sun make it possible to probe the inside of a star. The frequencies of the oscillations have already provided measures of the sound speed and the rate of rotation throughout much of the solar interior. These quantities are important for understanding the dynamics of the magnetic cycle and have a bearing on testing general relativity by planetary precession. The oscillation frequencies yield a helium abundance that is consistent with cosmology, but they reinforce the severity of the neutrino problem. They should soon provide an important standard by which to calibrate the theory of stellar evolution.


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