On all possible static spherically symmetric EYM solitons and black holes

Details On all possible static spherically symmetric EYM solitons and black holes On all possible static spherically symmetric EYM solitons and black holes

2001-09-21

arxiv.org/abs/gr-qc/0109075v2

Class.Quant.Grav.19:457-482,2002

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

26 pages, 2 figures, LaTeX, misprints corrected, 1 reference added

Scientific paper

10.1088/0264-9381/19/3/303

We prove local existence and uniqueness of static spherically symmetric solutions of the Einstein-Yang-Mills equations for any action of the rotation group (or SU(2)) by automorphisms of a principal bundle over space-time whose structure group is a compact semisimple Lie group G. These actions are characterized by a vector in the Cartan subalgebra of g and are called regular if the vector lies in the interior of a Weyl chamber. In the irregular cases (the majority for larger gauge groups) the boundary value problem that results for possible asymptotically flat soliton or black hole solutions is more complicated than in the previously discussed regular cases. In particular, there is no longer a gauge choice possible in general so that the Yang-Mills potential can be given by just real-valued functions. We prove the local existence of regular solutions near the singularities of the system at the center, the black hole horizon, and at infinity, establish the parameters that characterize these local solutions, and discuss the set of possible actions and the numerical methods necessary to search for global solutions. That some special global solutions exist is easily derived from the fact that su(2) is a subalgebra of any compact semisimple Lie algebra. But the set of less trivial global solutions remains to be explored.

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