On the Adiabatic Pulsations of Tidally Perturbed Rotating Stars
Abstract
The stability of the adiabatic pulsations of a rotating star under the influence of the tidal action of a perturbing mass is investigated for the case where the envelope has a constant temperature gradient. The results of Ureche and Lungu (1975) for stability without the tidal effect still hold, but now the instability of the star appears at lower angular velocities. The thickness of the pulsating envelope is reduced by the tidal effect. The maximum instability appears at the substellar point. The stability condition shows the existence of a critical minimum separation of the components of a close binary system.
 Publication:

Bulletin of the Astronomical Institutes of Czechoslovakia
 Pub Date:
 1978
 Bibcode:
 1978BAICz..29..185U
 Keywords:

 Adiabatic Conditions;
 Binary Stars;
 Gravitational Effects;
 Stellar Mass;
 Stellar Rotation;
 Angular Velocity;
 Legendre Functions;
 Rotary Stability;
 Stellar Envelopes;
 Stellar Temperature;
 Temperature Gradients;
 Tides;
 Variable Stars;
 Astrophysics