3 papers
gr-qc2024
Mass formulas for supergravity black holes with string singularities
Igor Bogush, Dmitri Gal'tsov, Gérard Clément
We extend the derivation of mass formulas for stationary axisymmetric asymptotically locally flat solutions with string singularities on the polar axis to general supergravity acti…
gr-qc2023
The first law for stationary axisymmetric multi-black hole systems
Gérard Clément, Dmitry Gal'tsov
In the framework of Einstein-Maxwell theory, we consider collinear arrays of rotating electrically charged black holes connected by Misner-Dirac strings carrying gravimagnetic and…
gr-qc1998
Spinning ring wormholes: a classical model for elementary particles?
Gérard Clément
Static horizonless solutions to the Einstein--Maxwell field equations, with only a circular cosmic string singularity, are extended to exact rotating asymptotically flat solutions.…