Study of Compact Stars with Buchdahl Potential in 5-D Einstein-Gauss-Bonnet Gravity
Manuel Malaver
*
Department of Basic Sciences, Maritime University of the Caribbean, Catia la Mar, Venezuela.
Rajan Iyer
Department of Physical Mathematics Sciences Engineering Project Technologies, Environmental Materials Theoretical Physicist, Engineeringinc International Operational Teknet Earth Global, Tempe, Arizona, United States of America.
Israr Khan
Institute of Numerical Sciences, Kohat University of Science and Technology, Kohat, Pakistan.
*Author to whom correspondence should be addressed.
Abstract
The general theory of relativity has allowed a better understanding of the structure of universe. One of the fundamentals problems in the general relativity is finding exact solutions of the Einstein-Maxwell field equations. Some solutions found applications in astrophysics, cosmology and more recently in the developments inspired by string theory. In this paper, we presented a compact object model in the framework of Einstein-Gauss-Bonnet gravity (EGB) with a linear equation of state considering a metric potential proposed for Buchdahl (1959). The new obtained models satisfy all physical requirements of a physically reasonable stellar object. We analyzed the effect of the Gauss-Bonnet coupling constant α on the main physical characteristics of the model. We checked that the radial pressure, energy density and anisotropy are well defined and are regular in the interior of the star and are dependent of the values of the coupling constant.
Keywords: EGB gravity, linear equation of state, coupling constant, compact object, metric potential