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On the detection of subphotospheric convective velocities and temperature fluctuations

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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 k - ω 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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Authors and Affiliations

  1. Institute of Astronomy, and Department of Applied Mathematics and Theoretical Physics, University of Cambridge, UK

    D. O. Gough

  2. Joint Institute for Laboratory Astrophysics, and Department of Astrophysical, Planetary and Atmospheric Sciences, University of Colorado, Boulder, Colo., U.S.A.

    J. Toomre

Authors
  1. D. O. Gough
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  2. J. Toomre
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Additional information

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.

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Gough, D.O., Toomre, J. On the detection of subphotospheric convective velocities and temperature fluctuations. Sol Phys 82, 401–410 (1983). https://doi.org/10.1007/BF00145579

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  • DOI: https://doi.org/10.1007/BF00145579

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