The excitation and damping of solar oscillations

Details The excitation and damping of solar oscillations The excitation and damping of solar oscillations

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.323..235l&link_type=abstract

Nature (ISSN 0028-0836), vol. 323, Sept. 18, 1986, p. 235-238.

Computer Science

24

Oscillation Dampers, Oscillator Strengths, Self Excitation, Solar Oscillations, Magnetohydrodynamic Turbulence, Spherical Harmonics, Stable Oscillations, Stochastic Processes, Viscous Damping

Scientific paper

Present theories suggest two classes of excitation processes which may be responsible for the observed amplitudes of solar p-mode oscillations-self-excitation of the modes via an overstability mechanism such as the κ mechanism, and stochastic excitation by turbulent convection. The authors present data which stand in support of the latter mechanism. They use data from Big Bear Solar Observatory to compare theory and observation in detail. In particular, the data show that the energy per oscillation mode is nearly constant at low mode frequencies, and is approximately independent of degree at low degrees. The total energy in all the oscillation modes is estimated at ≡1034erg.

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