Advertisement

Excitation mechanisms of solar oscillations

  • Yoji Osaki
Part III Excitation Mechanism of Oscillations
Part of the Lecture Notes in Physics book series (LNP, volume 367)

Abstract

Excitation mechanisms of solar oscillations are reviewed. Two excitation mechanisms have been proposed for solar p-mode oscillations: the linear overstability due to the so-called κ-mechanism and the stochastic excitation by turbulent convection. Here we discuss the stochastic excitation mechanism in a greater detail because it is more likely to be the possible explanation than the former mechanism. In this mechanism, the amplitudes of oscillations are determined by the balance of the excitation rate by turbulent convection to the damping rate. We examine these two effects separately. In particular, we discuss the acoustic energy generation by turbulent convection and the question of quadrupole versus dipole radiation.

Keywords

Acoustic Radiation Acoustic Power Excitation Mechanism Turbulent Convection Solar Convection Zone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Ando, H., and Osaki, Y. 1975, Publ. Astron. Soc. Japan, 27, 581.Google Scholar
  2. Christensen-Dalsgaard, J., Gough, D.O., and Libbrecht, K.G. 1989, Astrophys. J. Letters, 341, L103.CrossRefGoogle Scholar
  3. Curle, N. 1955, Proc. Roy. Soc. London A, 231, 505.Google Scholar
  4. Goldreich, P., and Keeley, D.A. 1977, Astrophys. J., 211, 934.Google Scholar
  5. Goldreich, P., and Keeley, D.A. 1977b, Astrophys. J., 212, 243.CrossRefGoogle Scholar
  6. Goldreich, P., and Kumar, P. 1988, Astrophys. J., 326, 462.CrossRefGoogle Scholar
  7. Kumar, P., and Goldreich, P. 1989, Astrophys. J., 342, 558.Google Scholar
  8. Libbrecht, K.G. 1988a, Astrophys. J., 334, 510.CrossRefGoogle Scholar
  9. Libbrecht, K.G. 1988b, in Seismology of the Sun and Sun-like Stars, ed. E. Rolfe, ESA SP-286 (ESA Publication Division, Noordwijk), p.3.Google Scholar
  10. Lighthill, M.J. 1952, Proc. Roy. Soc. London A, 211, 564.Google Scholar
  11. Stein, R.F. 1967, Solar Phys., 2, 385.CrossRefGoogle Scholar
  12. Stein, R.F., and Leibacher, J.W. 1981, in the Sun as a Star, ed. S. Jordan, NASA SP-450, p.289.Google Scholar
  13. Unno, W. 1964, in Transactions I.A. U. XIIB (Academic Press, New York), p.555.Google Scholar

Copyright information

© Springer-Verlag 1990

Authors and Affiliations

  • Yoji Osaki
    • 1
  1. 1.Department of AstronomyUniversity of TokyoTokyoJapan

Personalised recommendations