35 citations · 103 across the 5 of their papers we have counts for
5 papers
Do intergalactic magnetic fields imply an open universe?
J. D. Barrow, C. G. Tsagas, K. Yamamoto
The detection of magnetic fields at high redshifts, and in empty intergalactic space, support the idea that cosmic magnetism has a primordial origin. Assuming that Maxwellian elect…
Origin of cosmic magnetic fields: Superadiabatically amplified modes in open Friedmann universes
J. D. Barrow, C. G. Tsagas, K. Yamamoto
Cosmological magnetic fields in open Friedmann universes can experience superadiabatic amplification within the realm of conventional electromagnetism. This is possible mathematica…
Vorticity production and survival in viscous and magnetized cosmologies
F. Dosopoulou, F. Del Sordo, C. G. Tsagas +1
We study the role of viscosity and the effects of a magnetic field on a rotating, self-gravitating fluid, using Newtonian theory and adopting the ideal magnetohydrodynamic approxim…
Covariant approach to the conformal dynamical equivalence in astrophysics
N. K. Spyrou, C. G. Tsagas
We use covariant techniques to examine the implications of the dynamical equivalence between geodesic motions and adiabatic hydrodynamic flows. Assuming that the metrics of a geode…
Magnetic field amplification in CDM anisotropic collapse
M. Bruni, R. Maartens, C. G. Tsagas
We use the Zel'dovich approximation to analyse the amplification of magnetic fields in gravitational collapse of cold dark matter during the mildly nonlinear regime, and identify t…