An approximate Kerr-Newman-like metric endowed with a magnetic dipole and mass quadrupole  

作　　者：Francisco Frutos-Alfaro 

机构地区：[1]Space Research Center and School of Physics,University of Costa Rica,San Pedro,San Jose,Costa Rica

出　　处：《Communications in Theoretical Physics》2024年第8期124-138,共15页理论物理通讯（英文版）

摘　　要：Approximate all-terrain spacetimes for astrophysical applications are presented. The metrics possess five relativistic multipole moments, namely, mass, rotation, mass quadrupole, charge,and magnetic dipole moment. All these spacetimes approximately satisfy the Einstein-Maxwell field equations. The first metric is generated using the Hoenselaers-Perjés method from given relativistic multipoles. The second metric is a perturbation of the Kerr-Newman metric, which makes it a relevant approximation for astrophysical calculations. The last metric is an extension of the Hartle-Thorne metric that is important for obtaining internal models of compact objects perturbatively. The electromagnetic field is calculated using Cartan forms for locally non-rotating observers. These spacetimes are relevant for inferring properties of compact objects from astrophysical observations. Furthermore, the numerical implementations of these metrics are straightforward, making them versatile for simulating potential astrophysical applications.

关 键 词：GRAVITATION Einstein-Maxwell equations Compact objects 

分 类 号：P14[天文地球—天体物理]