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Wormhole geometries with conformal motions
Christian G. Boehmer, Tiberiu Harko, Francisco S. N. Lobo
Exact solutions of traversable wormholes were recently found under the assumption of spherical symmetry and the existence of a non-static conformal symmetry. In this paper, we veri…
Perfect fluid spheres with cosmological constant
Christian G. Boehmer, Gyula Fodor
We examine static perfect fluid spheres in the presence of a cosmological constant. New exact matter solutions are discussed which require the Nariai metric in the vacuum region. W…
Loop Quantum Dynamics of the Schwarzschild Interior
Christian G. Boehmer, Kevin Vandersloot
We examine the Schwarzschild interior of a black hole, incorporating quantum gravitational modifications due to loop quantum gravity. We consider an improved loop quantization usin…
The Einstein-Yang-Mills equations from Bianchi identities
Christian G. Boehmer, Luca Fabbri
We suggest a novel extension to the Kaluza-Klein scheme that allows us to obtain consistently all SU(n) Einstein-Yang-Mills theories. This construction is based on allowing the fiv…
Generalized virial theorem in f(R) gravity
Christian G. Boehmer, Tiberiu Harko, Francisco S. N. Lobo
We generalize the virial theorem in f(R) modified gravity using the collisionless Boltzmann equation. We find supplementary geometric terms in the modified Einstein equation provid…
Dark matter as a geometric effect in f(R) gravity
Christian G. Boehmer, Tiberiu Harko, Francisco S. N. Lobo
We consider the behavior of the tangential velocity of test particles moving in stable circular orbits in f(R) modified theories of gravity. A large number of observations at the g…