Abstract
We numerically investigated the sequences of initial data of a thin spindle and a thin ring in five-dimensional space-time in the context of the cosmic censorship conjecture. We modeled the matter in non-rotating homogeneous spheroidal or toroidal configurations under the momentarily static assumption, solved the Hamiltonian constraint equation and searched the apparent horizons. We discussed when S3 (black-hole) or S1 × S2 (black-ring) horizons (‘black objects’) are formed. By monitoring the location of the maximum Kretchmann invariant, an appearance of ‘naked singularity’ or ‘naked ring’ under special situations is suggested. We also discuss the validity of the hyper-hoop conjecture using a minimum area around the object, and show that the appearance of the ring horizon does not match with this hoop.
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