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On the Detection of Subphotospheric Convective Velocities and Temperature Fluctuations*

  • D. O. Gough (a1) and J. Toomre (a2)

Abstract

A procedure is outlined for estimating the influence of large-scale convective eddies on the wave patterns of five-minute oscillations of high degree. The method is applied to adiabatic oscillations, with frequency ω and wave number k, of a plane-parallel polytropic layer upon which is imposed a low-amplitude convective flow. The distortion to the kω relation has two constituents: one depends on the horizontal component of the convective velocity and has a sign which depends on the sign of ω/k; the other depends on temperature fluctuations and is independent of the sign of ω/k. The magnitude of the distortion is just at the limit of present observational sensitivity. Thus there is reasonable hope that it will be possible to reveal some aspects of the large-scale flow in the solar convection zone

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Copyright

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Proceedings of the 66th IAU Colloquium: Problems in Solar and Stellar Oscillations, held at the Crimean Astrophysical Observatory, U.S.S.R., 1-5 September, 1981.

Footnotes

References

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Berthomieu, G., Cooper, A. J., Gough, D. O., Osaki, Y., Provost, J., and Rocca, A.: 1980, in Hill, H. A. and Dziembowski, W. A.(eds.), Nonradial and Nonlinear Stellar Pulsation, Springer, ]Heidelberg, p. 307.
Deubner, F.-L., Ulrich, R. K., and Rhodes, Jr. E. J.: 1979,Astron. Astrophys. 72, 177.
Gough, D. O.: 1978, in Belvedere, G. and Paterno, L. (eds.), Proc. Workshop on Solar Rotation, University of Catania Press, Catania, p. 255.
Graham, E.: 1975, J. Fluid Mech. 70, 689.
Hill, F., Toomre, J., and November, L.: 1983, Solar Phys. 82, 411 (this volume).
Lamb, H.: 1932, Hydrodynamics, Cambridge University Press, Cambridge.
Latour, J., Toomre, J., and Zahn, J.-P.: 1983, Solar Phys. 82, 387 (this volume).
Lubow, S. H., Rhodes, Jr. E. J., and Ulrich, R. K.: 1980, in Hill, H. A. and Dziembowski, W. A. (eds.), Nonradial and Nonlinear Stellar Pulsation, Springer, Heidelberg, p. 300.

On the Detection of Subphotospheric Convective Velocities and Temperature Fluctuations*

  • D. O. Gough (a1) and J. Toomre (a2)

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