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## Homothetic vectors and higher-order Lagrangian theories of gravity

- A A Coley
- Physics, Mathematics
- 1989

In general relativity the geometrical property of the existence of a homothetic vector in a perfect fluid spacetime implies the physical property of self-similarity. It is shown that in higher-order… Expand

## Qualitative analysis of causal anisotropic viscous-fluid cosmological models

- R J van den Hoogen, A A Coley
- Mathematics
- 1995

The truncated Israel--Stewart theory of irreversible thermodynamics is used to describe the bulk viscous pressure and the anisotropic stress in a class of spatially homogeneous viscous-fluid… Expand

## Self-similarity in general relativity

The different kinds of self-similarity in general relativity are discussed, with special emphasis on similarity of the `first' kind, corresponding to spacetimes admitting a homothetic vector. We then… Expand

## Fluid spacetimes admitting a conformal Killing vector parallel to the velocity vector

- A A Coley
- Mathematics
- 1991

The author proves the result that any perfect fluid solution of Einstein's field equations satisfying a barotropic equation of state p=p( mu ) and the condition mu +p not=O, which admits a proper… Expand

## Scalar field cosmologies with barotropic matter: models of Bianchi class B

- A P Billyard, A A Coley, R J van den Hoogen, J Ibáñez, I Olasagasti
- Physics, Mathematics
- 1999

We investigate in detail the qualitative behaviour of the class of Bianchi type B spatially homogeneous cosmological models in which the matter content is composed of two non-interacting components;… Expand

## Magnetic fields and the cosmic microwave background

- C A Clarkson, A A Coley
- Physics
- 2001

Observations of the high degree of isotropy of the cosmic microwave background are commonly believed to indicate that the Universe is `almost' Friedmann-Lemaître-Robertson-Walker (at least since the… Expand

## Scaling solutions in Robertson-Walker spacetimes

- R J van den Hoogen, A A Coley, D. Wands
- Physics, Mathematics
- 1999

We investigate the stability of cosmological scaling solutions describing a barotropic fluid with p = (-1) and a non-interacting scalar field with an exponential potential V() = V0e-. We study… Expand

## Qualitative analysis of viscous fluid cosmological models satisfying the Israel-Stewart theory of irreversible thermodynamics

- A A Coley, R J van den Hoogen
- Mathematics
- 1995

Isotropic and spatially homogeneous viscous fluid cosmological models are investigated using the truncated Israel-Stewart theory of irreversible thermodynamics to model the bulk viscous pressure. The… Expand

## On scaling solutions with a dissipative fluid

- J Ibáñez, C A Clarkson, A A Coley
- Mathematics
- 2002

We study the asymptotic behaviour of scaling solutions with a dissipative fluid and show that, contrary to recent claims, the existence of a stable accelerating attractor solution which solves the… Expand

## Isotropic singularity in inhomogeneous brane cosmological models

We discuss the asymptotic dynamical evolution of spatially inhomogeneous brane-world cosmological models close to the initial singularity. By introducing suitable scale-invariant dependent variables… Expand

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