Influence of convection on the vibrational stability of stars towards non-radial oscillations

Details Influence of convection on the vibrational stability of stars towards non-radial oscillations Influence of convection on the vibrational stability of stars towards non-radial oscillations

Apr 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....40...33g&link_type=abstract

Astronomy and Astrophysics, vol. 40, no. 1-2, Apr. 1975, p. 33-39.

Astronomy and Astrophysics

Astrophysics

23

Astronomical Models, Convection, Dynamic Stability, Stellar Structure, Vibration Damping, Continuity Equation, Convective Heat Transfer, Equations Of Motion, Hydrodynamic Equations, Radial Distribution, Time Dependence

Scientific paper

The relationship between convection and nonradial oscillations is analyzed in regard to the vibrational stability of stars. The equations for pulsation and convection are deduced in a rather general form from the basic equations of hydrodynamics, and solutions are discussed for nonradial motion as well as stationary convection. These equations are perturbed and solved in a local approximation, the coefficient of vibrational stability is derived, and the solutions are compared with previous ones for the case of radial oscillations. The results are applied to 30-solar mass models as an example of stars with a convective core and to solar models as an example of stars with a convective envelope. It is found that the nonradial component of perturbations of the convective flux has a destabilizing influence everywhere in a core and in the major part of an envelope.

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