358 citations · 3.7k across the 79 of their papers we have counts for
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Magnetic tension and gravitational collapse
Christos G. Tsagas
The gravitational collapse of a magnetised medium is investigated by studying qualitatively the convergence of a timelike family of non-geodesic worldlines in the presence of a mag…
Godel brane
John D. Barrow, Christos G. Tsagas
We consider the brane-world generalisation of the Godel universe and analyse its dynamical interaction with the bulk. The exact homogeneity of the standard Godel spacetime no longe…
Dynamics and stability of the Godel universe
John D. Barrow, Christos G. Tsagas
We use covariant techniques to describe the properties of the Godel universe and then consider its linear response to a variety of perturbations. Against matter aggregations, we fi…
The Emergent Universe: An Explicit Construction
George F. R. Ellis, Jeff Murugan, Christos G. Tsagas
We provide a realisation of a singularity-free inflationary universe in the form of a simple cosmological model dominated at early times by a single minimally coupled scalar field…