Internal Structure and Apsidal Motions of Polytropic Stars in Close Binaries

FV Sirotkin, WT Kim - The Astrophysical Journal, 2009 - iopscience.iop.org
We consider a synchronized, circular-orbit binary consisting of a polytrope with index n and
a point-mass object, and use a self-consistent field (SCF) method to construct the …

Equilibrium structures of rotationally and tidally distorted polytropic models of stars

AK Lal, S Saini, C Mohan, VP Singh - Astrophysics and space science, 2006 - Springer
We propose suitable modifications in the concept of Roche equipotentials to account for the
effect of mass distribution inside a star. The Kippenhahn and Thomas (1970) approach is …

Equilibrium structure of stars obeying a generalized differential rotation law

C Mohan, AK Lal, VP Singh - Astrophysics and space science, 1994 - Springer
In the present paper we have considered the problem of determining the equilibrium
structure of differentially rotating stars in which the angular velocity of rotation varies both …

Effects of mass variation on structures of differentially rotating polytropic stars

S Kumar, S Saini, KK Singh - New Astronomy, 2018 - Elsevier
A method is proposed for determining equilibrium structures and various physical
parameters of differentially rotating polytropic models of stars, taking into account the effect …

Effect of mass variation on the radial oscillations of differentially rotating and tidally distorted polytropic stars

S Saini, S Kumar, AK Lal - Astrophysics, 2015 - Springer
A method is proposed to compute the eigenfrequencies of small adiabatic pseudo-radial
modes of oscillations of differentially rotating and tidally distorted stellar models by taking …

Oscillations of differentially rotating and tidally distorted gaseous spheres: Effect of non-uniform density

S Kumar, S Saini, KK Singh, V Bhatt, C Mohan - New Astronomy, 2021 - Elsevier
Abstract The original Strum-Liouville type of equation is tuned suitably to study the
pulsational properties of gaseous spheres of non-uniform densities from centre to surface …

On the validity of series expansion being used for the position of a point on a Roche equipotential

AK Lal, S Saini, C Mohan, VP Singh - Astrophysics and Space Science, 2007 - Springer
The concept of Roche equipotentials has been frequently used in literature to study the
problems of rotating stars and stars in binary systems. However in spite of using this …

Equilibrium structures of differentially rotating primary components of binary stars

C Mohan, AK Lal, VP Singh - Astrophysics and space science, 1997 - Springer
In this paper a method is proposed for computing the equilibrium structures and various
other observable physical parameters of the primary components of stars in binary systems …

[PDF][PDF] Equilibrium structure of differentially rotating and tidally distorted polytropic gaseous spheres

S Kumar, AK Lal, VP Singh, S Saini - World Journal of Modeling …, 2011 - researchgate.net
In this paper we propose a method for computing the equilibrium structure and various
physical parameters of differentially rotating and tidally distorted polytropic stars. The law of …

Small adiabatic barotropic non-radial modes of oscillations of differentially rotating stars

S Kumar, S Saini, V Bhatt, P Bedi… - AIP Conference …, 2022 - pubs.aip.org
In this paper the approach of Mohan and Saxena (for instance see: C. Mohan and RM
Saxena; Effect of rotation and tidal distortion on the periods of small adiabatic oscillations of …