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6 papers · 1 filter
Charged gravastars admitting conformal motion
A A Usmani, Farook Rahaman, Saibal Ray +4
We propose a new model of a {\it gravastar} admitting conformal motion. While retaining the framework of the Mazur-Mottola model, the gravastar is assumed to be internally charged,…
A comparison of Hořava-Lifshitz gravity and Einstein gravity through thin-shell wormhole construction
Farook Rahaman, P. K. F. Kuhfittig, M. Kalam +2
In this paper we have constructed a new class of thin-shell wormholes from black holes in Hořava-Lifshitz gravity. Particular emphasis is placed on those aspects that allow a compa…
Galactic rotation curves inspired by a noncommutative-geometry background
F. Rahaman, Peter K. F. Kuhfittig, K. Chakraborty +2
This paper discusses the observed at rotation curves of galaxies in the context of noncommutative geometry. The energy density of such a geometry is diffused throughout a region du…
The stability of thin-shell wormholes with a phantom-like equation of state
Peter K. F. Kuhfittig
This paper discusses the stability to linearized radial perturbations of spherically symmetric thin-shell wormholes with a "phantom-like" equation of state for the exotic matter at…
Thin-shell wormholes from charged black holes in generalized dilaton-axion gravity
A. A. Usmani, F. Rahaman, Saibal Ray +3
This paper discusses a new type of thin-shell wormhole constructed by applying the cut-and-paste technique to two copies of a charged black hole in generalized dilaton-axion gravit…
Some remarks on exact wormhole solutions
Peter K. F. Kuhfittig
Exact wormhole solutions, while eagerly sought after, often have the appearance of being overly specialized or highly artificial. A case for the possible existence of traversable w…