358 citations · 3.7k across the 79 of their papers we have counts for
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Gravito-magnetic amplification in cosmology
Christos G. Tsagas
Magnetic fields interact with gravitational waves in various ways. We consider the coupling between the Weyl and the Maxwell fields in cosmology and study the effects of the former…
Large-scale magnetic fields in cosmology
Christos G. Tsagas
Despite the widespread presence of magnetic fields, their origin, evolution and role are still not well understood. Primordial magnetism sounds appealing but is not problem free. T…
On the stability of static ghost cosmologies
John D Barrow, Christos G Tsagas
We consider the classical linear stability of a static universe filled with a non-interacting mixture of isotropic radiation and a ghost scalar field. Unlike the conventional Einst…
Large-scale peculiar motions and cosmic acceleration
Christos G Tsagas
Recent surveys seem to support bulk peculiar velocities well in excess of those anticipated by the standard cosmological model. In view of these results, we consider here some of t…