首页|An approximate Kerr-Newman-like metric endowed with a magnetic dipole and mass quadrupole
An approximate Kerr-Newman-like metric endowed with a magnetic dipole and mass quadrupole
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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-Peijés 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.
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