Radiating black holes in Einstein-Yang-Mills theory and cosmic censorship

Details Radiating black holes in Einstein-Yang-Mills theory and cosmic censorship Radiating black holes in Einstein-Yang-Mills theory and cosmic censorship

2010-09-06

arxiv.org/abs/1009.0982v1

Phys.Rev.D82:044038,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

9 RevTeX pages, 1 figure

Scientific paper

10.1103/PhysRevD.82.044038

Exact nonstatic spherically symmetric black-hole solution of the higher dimensional Einstein-Yang-Mills equations for a null dust with Yang-Mills gauge charge are obtained by employing Wu-Yang \textit{ansatz}, namely, HD-EYM Vaidya solution. It is interesting to note that gravitational contribution of YM gauge charge for this ansatz is indeed opposite (attractive rather than repulsive) that of Maxwell charge. It turns out that the gravitational collapse of null dust with YM gauge charge admit strong curvature shell focusing naked singularities violating cosmic censorship. However, there is significant shrinkage of the initial data space for a naked singularity of the HD-Vaidya collapse due to presence of YM gauge charge. The effect of YM gauge charge on structure and location of the apparent and event horizons is also discussed.

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