Gravitational redshift in Kerr field

National Conference on Contemporary Issues in High Energy Physics and Cosmology

Dubey, Anuj Kumar^1 ; Sen, Asoke Kumar^1

Department of Physics, Assam University, Silchar-788011, Assam, India^1

关键词: Einstein's field equations;    Exact solution;    General Relativity;    Gravitational redshift;    Newtonians;    Schwarzschild geometry;    Space time;    Spherical symmetry;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/481/1/012010/pdf
DOI  :  10.1088/1742-6596/481/1/012010

来源: IOP

【 摘 要 】

Generally gravitational redshift has been calculated without consideration of rotation of a body. Neglecting the rotation, the geometry of space time can be described by using the well-known spherically symmetric Schwarzschild geometry. Rotation has great effect on general relativity, which gives new challenges on gravitational redshift. When rotation is taken into consideration spherical symmetry lost and off diagonal terms appears in the metric and the geometry of space time can be described by using the Kerr solution, which is the exact solution of the Einstein's field equations known at present. In this paper we will derive the expression for gravitational redshift for rotating source in Kerr field, and also apply the derived expression to calculate the gravitational redshift in case of Sun under Newtonian approximation of angular momentum.