Hostname: page-component-5c6d5d7d68-wpx84 Total loading time: 0 Render date: 2024-08-10T02:18:18.997Z Has data issue: false hasContentIssue false

Photoconvection

Published online by Cambridge University Press:  15 February 2018

E.A. Spiegel*
Affiliation:
Astronomy Department, Columbia University, New York, New York 10027, U.S.A.

Extract

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.

Convection under the influence of dynamically significant radiation fields occurs routinely in hot stars (Underhill 1949 ab) and probably also in a variety of other objects near the Eddington limit (Joss, Salpeter, and Ostriker 1973). Yet this topic, which is here called photoconvection, has not been actively investigated prior to the present decade. Except for limiting cases, the stability condition does not seem to have been worked out and only some preliminary notions exist about the highly unstable case. This is somewhat surprising since it has long been suspected that some of the vigorous dynamical activity observed in hot stars (Huang and Struve 1960, Reimers 1976) is caused by radiative forces (Underhill 1949 ab). In the hope that this neglect may be compensated for by the application of some of the techniques described at this meeting, I shall sketch some of the main features of this topic.

Type
VII. Special Topics
Copyright
Copyright © 1976

References

Batchelor, G.K. 1967, An Introduction to Fluid Dynamics, Cambridge Univ. Press, p. 475 Google Scholar
Berthomieu, J. Provost, A., and Rocca, A. 1976, Astron. and Astrophys., 4738, 413 Google Scholar
Chandrasekhar, S. 1939, “An Introduction to Stellar Structure”Google Scholar
Davies, R.M. and Taylor, G.I. 1950, Proc. Roy. Soc. Lon. A, 20038, 375 Google Scholar
Estabrook, K.G., Valeo, E.J. and Knuer, W.L. 1975, Phys. Fluids, 1838, 1151 Google Scholar
Hearn, A.G. 1972, Astron. and Astrophys., 1938, 417 Google Scholar
Hearn, A.G. 1973, Astron. and Astrophys., 2338, 97 Google Scholar
Hsieh, S.-H. and Spiegel, E.A. 1976, Ap. J., 20738, 244 Google Scholar
Huang, S.-S. and Struve, O. 1960, Stellar Atmospheres, Greenstein, J.L., ed., Univ. of Chicago Press, p. 300 Google Scholar
Jackson, R. 1971, Fluidization, Davidson, J.F. and Harrison, D., eds., Academic Press, p. 65 Google Scholar
Joss, P.C., Salpeter, E.E., and Ostriber, J.P. 1973, Ap. J., 18138, 429 Google Scholar
Moore, D.W. 1959, J.F.M., 638, 113 Google Scholar
Prendergast, K.H. and Spiegel, E.A. 1973, Comments Ap. Space Phys., 538, 43 Google Scholar
Reimers, M.D. 1976, Physique des Mouvements dans les Atmosphères Stellaires, Cayrel, R. and Steinberg, M., eds., C.N.R.S., p. 421 Google Scholar
Rowe, P.N. 1976, Fluidization, Davidson, J.F. and Harrison, D., eds., Academic Press, p. 121 Google Scholar
Simon, R. 1963, J. Quant. Spectrosc. Radiat. Transfer, 338, 1 Google Scholar
Spiegel, E.A. 1976, Physique des Mouvements dans les Atmosphères Stellaires, Cayrel, R. and Steinberg, M., eds., C.N.R.S., p. 19 Google Scholar
Thome, V.A. 1973, Report RC59, Dept. of Computer Science, Univ. of ReadingGoogle Scholar
Wegener, P.P. and Parlange, J.-Y. 1973, Ann. Rev. Fluid Mech., 538, 79 Google Scholar
Wentzel, D.G. 1970, Ap. J., 16038, 373 Google Scholar