144 citations · 175 across the 4 of their papers we have counts for
7 papers
The classical Kepler problem and geodesic motion on spaces of constant curvature
Aidan J. Keane, Richard K. Barrett, John F. L. Simmons
In this paper we clarify and generalise previous work by Moser and Belbruno concerning the link between the motions in the classical Kepler problem and geodesic motion on spaces of…
Kinematic model inversions of hot star recurrent DAC data - tests against dynamical CIR models
J. Krticka, R. K. Barrett, J. C. Brown +1
The Discrete Absorption Components (DACs) commonly observed in the ultraviolet lines of hot stars have previously been modelled by dynamical simulations of Corotating Interaction R…
Inhomogeneous cosmologies, the Copernican principle and the cosmic microwave background: More on the EGS theorem
C. A. Clarkson, A. A. Coley, E. S. D. O'Neill +2
We discuss inhomogeneous cosmological models which satisfy the Copernican principle. We construct some inhomogeneous cosmological models starting from the ansatz that the all the o…
Covariant Perturbations of Schwarzschild Black Holes
Chris A. Clarkson, Richard K. Barrett
We present a new covariant and gauge-invariant perturbation formalism for dealing with spacetimes having spherical symmetry (or some preferred spatial direction) in the background,…
Undermining the Cosmological Principle: Almost Isotropic Observations in Inhomogeneous Cosmologies
R. K. Barrett, C. A. Clarkson
We challenge the widely held belief that the cosmological principle is an obvious consequence of the observed isotropy of the cosmic microwave background radiation, combined with t…
The Conformal Group SO(4,2) and Robertson-Walker Spacetimes
Aidan J. Keane, Richard K. Barrett
The Robertson-Walker spacetimes are conformally flat and so are conformally invariant under the action of the Lie group SO(4,2), the conformal group of Minkowski spacetime. We find…