Convection in a periodic gravitational field. II

Details Convection in a periodic gravitational field. II Convection in a periodic gravitational field. II

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977afz....13..703i&link_type=abstract

Astrofizika, vol. 13, Nov. 1977, p. 703-710. In Russian.

Astronomy and Astrophysics

Astrophysics

1

Binary Stars, Cepheid Variables, Convection, Gravitational Fields, Stellar Gravitation, Astronomical Models, Astrophysics, Convective Heat Transfer, Dwarf Stars, Energy Transfer, Periodic Variations, Phase Shift, Radiative Heat Transfer, Relaxation Time, Stellar Rotation, Temperature Gradients

Scientific paper

A convective energy flux is analyzed under conditions of temporally periodic variations in the acceleration of gravity, which are encountered in the case of Cepheids and in components of close binary systems during asynchronous rotation. It is shown that the amplitude and phase of oscillations in the convective energy flux depend on the ratio between the thermal and mechanical relaxation times of the convective elements. The results indicate that the phase shift of convective-flux oscillations will be positive if the mechanical relaxation time is smaller (which occurs in late-type dwarfs) and will be negative if the thermal relaxation time is smaller (which may occur in Cepheids).

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