On explicit solutions to the stationary axisymmetric Einstein-Maxwell equations describing dust disks

Details On explicit solutions to the stationary axisymmetric Einstein-Maxwell equations describing dust disks On explicit solutions to the stationary axisymmetric Einstein-Maxwell equations describing dust disks

2005-12-22

arxiv.org/abs/gr-qc/0512134v1

Annalen Phys. 12 (2003) 599

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

44 pages, 11 figures, review

Scientific paper

10.1002/andp.200310029

We review explicit solutions to the stationary axisymmetric Einstein-Maxwell equations which can be interpreted as disks of charged dust. The disks of finite or infinite extension are infinitesimally thin and constitute a surface layer at the boundary of an electro-vacuum. The Einstein-Maxwell equations in the presence of one Killing vector are obtained by using a projection formalism. The SU(2,1) invariance of the stationary Einstein-Maxwell equations can be used to construct solutions for the electro-vacuum from solutions to the pure vacuum case via a so-called Harrison transformation. It is shown that the corresponding solutions will always have a non-vanishing total charge and a gyromagnetic ratio of 2. Since the vacuum and the electro-vacuum equations in the stationary axisymmetric case are completely integrable, large classes of solutions can be constructed with techniques from the theory of solitons. The richest class of physically interesting solutions to the pure vacuum case due to Korotkin is given in terms of hyperelliptic theta functions. The Harrison transformed hyperelliptic solutions are discussed.

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