3 papers
gr-qc2024
Quasi-local mass on rigid or round spheres in Kerr spacetime
Jacek Jezierski, Tomasz SmoÅka
We introduce and analyze quasi-local mass using Hamiltonian methods. It is based on multipole decomposition for surfaces that are topological spheres. Based on the above model, tes…
gr-qc2024
Interacting Kerr-Newman Electromagnetic Fields
Sajad Aghapour, Lars Andersson, Kjell Rosquist +1
In this paper, we study some of the properties of the limit of the Kerr-Newman solution of Einstein-Maxwell equations. Noting Carter's observation of the near equality be…
gr-qc2024
Hopfion-like solutions in de Sitter spacetime
Adam Grzela, Jacek Jezierski, Tomasz SmoÅka
We construct electromagnetic field with non-trivial topological properties on de Sitter background. The field is closely related with Hopf fibration. We analyze energy, angular mom…