Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-20T01:24:51.376Z Has data issue: false hasContentIssue false
  • English
  • Français

Turbulence in Stellar Interiors

Published online by Cambridge University Press:  12 April 2016

Jean-Paul Zahn
Jean-Paul Zahn*
Affiliation:
observatoire Midi-Pyrénées, 14 ave. E. Belin, 31400 Toulouse, France Astronomy Department, Columbia University, New York, NY 10027, U.S.A.

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

This review focusses on the most recent work which has been achieved concerning turbulence in stellar interiors. Among all possible causes for such turbulence, the most powerful is certainly the convective instability in unstably stratified regions, but little was known until now beyond the fact that thermal convection is capable of establishing an almost adiabatic stratification. The latest numerical simulations (Stein & Nordlund 1989; Cataneo et al. 1991) show that turbulent convection is highly intermittent, with strong downdrafts carrying most of the energy flux.

These plumes penetrate in the stable region below, which they render nearly adiabatic over some distance (Zahn 1991); the penetration depth should be measured soon through acoustic sounding of the Sun (Berthomieu et al. 1992). Such plumes are likely to exist also in a convective core, and to penetrate into the radiative region above (Roxburgh 1989).

Type
III. Input physics for stellar structure
Information
International Astronomical Union Colloquium , Volume 137: Inside the Stars , 1993 , pp. 236 - 245
Copyright
Copyright © Astronomical Society of the Pacific 1993

References

Baker, N.H., Kuhfuβ, R. 1987, Astr. Ap., 185, 117 Google Scholar
Berthomieu, G., Morel, P., Provost, J., Zahn, J.-P. 1992, Astr. Ap., (preprint)Google Scholar
Bondi, H., Lyttleton, R.A. 1948, Proc. Cambridge Phil. Soc., 44, 345 CrossRefGoogle Scholar
Brandenburg, A., Jennings, R., Nordlund, Å., Rieutord, M., Ruokilainene, J., Stein, R., Tuominen, I. 1992, Ap. J., (preprint)Google Scholar
Bretherton, F.P., Spiegel, E.A. 1968, Ap. J., 153, 277 Google Scholar
Brown, T.M., Christensen-Dalsgaard, J., Dziembowski, W.A., Goode, P., Gough, D.O., Morrow, C.A., 1989, Ap. J., 343, 526 Google Scholar
Cattaneo, F., Brummel, N.H., Toomre, J., Malagoli, A., Hurlburt, N.E. 1991, Ap. J., 370, 282 Google Scholar
Chaboyer, B., Zahn, J.-P. 1992, Astr. Ap., 253, 173 Google Scholar
Chan, K.L., Sofia, S. 1986, Ap. J., 307, 222 Google Scholar
Charbonneau, P. 1992, Astr. Ap., (preprint)Google Scholar
Eddington, A.S. 1925, Observatory, 48, 78 Google Scholar
Endal, A.S., Sofia, S. 1976, Ap. J., 210, 184 Google Scholar
Goode, P.R., Dziembowski, W.A., Korzennick, S.G., Rhodes, E.J. 1991, Ap. J., 367, 649 Google Scholar
Greenspan, H., Howard, L.N. 1963, J. Fluid Mech., 17, 385 CrossRefGoogle Scholar
Howard, L.N., Moore, D.W., Spiegel, E.A. 1967, Nature, 214, 1297 Google Scholar
Hurlburt, N.E., Toomre, J., Massaguer, J.M. 1984, Ap. J., 282, 557 CrossRefGoogle Scholar
Hurlburt, N.E., Toomre, J., Massaguer, J.M. 1986, Ap. J., 311, 563 CrossRefGoogle Scholar
Law, W.Y., Knobloch, E., Spruit, H.C. 1984, Observational Tests of Stellar Evolution Theory (ed. Maeder, A., Renzini, A.; Reidel), 523 Google Scholar
Libbrecht, K.G., Woodard, M.F., Kaufman, J.M. 1990, Ap. J. Suppl, 74, 1129 Google Scholar
Morel, P., Provost, J., Berthomieu, G. 1990, Solar Phys. 128, 7 Google Scholar
Nordlund, Å., Dravins, D. 1990, Astr. Ap., 228, 155 Google Scholar
Rhines, P.B. 1979, Ann. Rev. Fluid Mech., 11, 401 Google Scholar
Renzini, A. 1987, Astr. Ap., 188, 49 Google Scholar
Rieutord, M., Zahn, J.-P. 1991, The Sun and Cool Stars: Activity, Magnetism, Dynamos (ed. Tuominen, I., Moss, D., Rüdiger, G.; Springer), 193 Google Scholar
Roxburgh, I.W. 1978, Astr. Ap., 65, 281 Google Scholar
Roxburgh, I.W. 1989, Astr. Ap., 211, 361 Google Scholar
Roxburgh, I.W. 1992, Astr. Ap., (preprint)Google Scholar
Sakurai, T. 1970, Stellar Rotation (ed. Slettebak, A.; Reidel), 329 Google Scholar
Schmitt, J.H.M.M., Rosner, R., Bohn, H.U. 1984, Ap. J., 282, 316 Google Scholar
Simon, G.W., Weiss, N.O. 1991, M.N.R.A.S., 252, lp Google Scholar
Spiegel, E.A. 1972, Physics of the Solar System (ed. Rasool, S.I.; NASA, Washington)Google Scholar
Spiegel, E.A., Zahn, J.-P. 1992, Astr. Ap., (preprint)Google Scholar
Spruit, H.C., Nordlund, Å., Title, A.M. 1990, Ann. Rev. Astr. Ap., 28, 263 Google Scholar
Stein, R., Nordlund, Å. 1989, Ap. J., 242, L95 Google Scholar
Taylor, G.I. 1953, Proc. Roy. Astron. Soc. London A2, 19, 186 Google Scholar
Vogt, H. 1925, Astron. Nachr., 223, 229 CrossRefGoogle Scholar
Whitehead, J.A., Chen, M.M. 1970, J. Fluid Mech., 40, 549 CrossRefGoogle Scholar
Zahn, J.-P. 1975, Mém. Soc. Roy. Sci. Liège, 6e série, 8, 31 Google Scholar
Zahn, J.-P. 1991, Astr. Ap., 252, 179 Google Scholar
Zahn, J.-P. 1992, Astr. Ap., (preprint)Google Scholar