Seismology of the sun

Details Seismology of the sun Seismology of the sun

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985sci...229..923c&link_type=abstract

Science (ISSN 0036-8075), vol. 229, Sept. 6, 1985, p. 923-931. NASA-USAF-supported research.

Computer Science

Sound

73

Helioseismology, Solar Oscillations, Acoustic Velocity, Cosmology, Helium, Power Spectra, Relativity, Solar Gravitation, Solar Interior, Solar Neutrinos, Solar Rotation, Sound Waves, Stellar Evolution

Scientific paper

The use of the sun's oscillations, caused by the constructive interference between internally reflected waves, to study the interior of the sun is examined. Pressure and buoyancy have the strongest influence on oscillations; pressure fluctuations at high frequency produce acoustic waves and at low frequency buoyancy produces internal gravity waves. The theory of acoustic wave frequency, which is used to determine measurements of sound speed and rate of rotation of the solar interior as well as the thickness of the convection zone, is presented. The classification of solar oscillations is described. The models for acoustic modes of low degree and intermediate degree are discussed. The effect of internal speed, gravity modes, and solar rotation on solar models is determined. The oscillation frequencies yield an He abundance that is consistent with cosmology, but they reinforce the severity of the neutrino problem.

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