Degenerate black rings in D = 5 minimal supergravity

We consider both gauged and ungauged minimal supergravities in five dimensions analyse the charged rotating solutions with two equal angular momenta J. When electric charge Q ∼ J2/3 some specific coefficient, we find new extremal black objects emerge that are asymptotic to either Minkowski or global AdS spacetimes can be best described as degenerate rings. Their near-horizon geometry is locally AdS3 × S2, where periodic U(1) fibre coordinate S3 untwists collapses part of horizon. It turns out there branches holes, starting RN holes same mass, but opposite charges. With increasing momentum, they will join become ring, Gibbs free energies however not continuous at joining. For Q(J) relation, addition a soliton whose mass smaller than ring.