346 citations · 3.7k across the 115 of their papers we have counts for
5 papers · 2 filters
An asymptotic analysis of spherically symmetric perfect fluid self-similar solutions
B. J. Carr, A. A. Coley
The asymptotic properties of self-similar spherically symmetric perfect fluid solutions with equation of state p=alpha mu (-1<alpha<1) are described. We prove that for large and sm…
Cyclical Behaviour in Early Universe Cosmologies
Andrew P. Billyard, Alan A. Coley, James E. Lidsey
We study early universe cosmologies derived from a scalar-tensor action containing cosmological constant terms and massless fields. The governing equations can be written as a dyna…
On space-times admitting shear-free, irrotational, geodesic null congruences
A. M. Sintes, A. A. Coley, D. J. McManus
Space-times admitting a shear-free, irrotational, geodesic null congruence are studied. Attention is focused on those space-times in which the gravitational field is a combination…
Closed cosmologies with a perfect fluid and a scalar field
Alan Coley, Martin Goliath
Closed, spatially homogeneous cosmological models with a perfect fluid and a scalar field with exponential potential are investigated, using dynamical systems methods. First, we co…
Self-similar spherically symmetric cosmological models with a perfect fluid and a scalar field
Alan Coley, Martin Goliath
Self-similar, spherically symmetric cosmological models with a perfect fluid and a scalar field with an exponential potential are investigated. New variables are defined which lead…