Oscillations of rotationally and tidally distorted composite models of stars of non-uniform densities

Abstract

The methodology used to find eigen-frequencies (EF) of small adiabatic pseudo-radial modes of oscillations of rotationally and tidally (R\&T) deformed stellar models takes into account the influence of mass variation on its equipotential surfaces inside the star. The current method has been used to calculate precise radial modes of oscillations of composite models (models of such series can be produced by modifying the exact position of the envelope-core interaction). Using three distinct interface values $0.3, 0.5$ and $0.7$ of $c^\star$ (interface parameter between core and envelope), certain conclusions have been made on the basis of this investigation.