Equilibrium Structures of Differentially Rotating and Tidally Distorted White Dwarf Models of Stars |
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| Authors: | Arvind Kumar Lal C Mohan V P Singh |
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| Institution: | (1) Thaper Institute of Engineering and Technology, India;(2) IIT, Roorkee;(3) Present address: Ambala College of Engineering and Applied Research, Ambala, Haryana, India;(4) IIT, Roorkee, (Saharanpur Campus), India |
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| Abstract: | In this paper we present a method for computing the equilibrium structures and various physical parameters of a primary component
of the binary system assuming that the primary is more massive than the secondary and is rotating differentially according
to the law of the w2 = b0 + b1 × s2 + b2 × s4, w being the angular velocity of rotation of a fluid element distant s from the axis of rotation and b0, b1, b2 suitably chosen numerical constants. This method utilizes the averaging approach of Kippenhahn and Thomas (1997) and the
concept of Roche equipotentials in a manner earlier used by Mohan et al. (1997) to incorporate the effects of rotation and
tidal distortions on the equilibrium structures of certain rotationally and tidally distorted stellar models. The use of the
method has been illustrated by applying it to obtain the structures and some observable parameters of certain differentially
rotating and tidally distorted binary systems whose primary component is assumed to be a white dwarf star. |
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| Keywords: | Structures Binary system White dwarf Differential rotation Tidal distortion |
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