536 citations · 1.1k across the 22 of their papers we have counts for
9 papers · 1 filter
General relativistic velocity: the alternative to dark matter
F. I. Cooperstock, S. Tieu
We consider the gravitational collapse of a spherically symmetric ball of dust in the general relativistic weak gravity regime. The velocity of the matter as viewed by external obs…
Galactic Dynamics via General Relativity: A Compilation and New Developments
F. I. Cooperstock, S. Tieu
We consider the consequences of applying general relativity to the description of the dynamics of a galaxy, given the observed flattened rotation curves. The galaxy is modeled as a…
Perspectives on Galactic Dynamics via General Relativity
F. I. Cooperstock, S. Tieu
Responses to questions, comments and criticism of our recent paper "General Relativity Resolves.." are provided. It is emphasized that our model is entirely natural to describe the…
General Relativity Resolves Galactic Rotation Without Exotic Dark Matter
F. I. Cooperstock, S. Tieu
A galaxy is modeled as a stationary axially symmetric pressure-free fluid in general relativity. For the weak gravitational fields under consideration, the field equations and the…
On the total energy of open Friedmann-Robertson-Walker universes
V. Faraoni, F. I. Cooperstock
The idea that the universe has zero total energy when one includes the contribution from the gravitational field is reconsidered. A Hamiltonian is proposed as an energy for the exa…
Evolution of the Scale Factor with a Variable Cosmological Term
J. M. Overduin, F. I. Cooperstock
Evolution of the scale factor a(t) in Friedmann models (those with zero pressure and a constant cosmological term Lambda) is well understood, and elegantly summarized in the review…
The influence of the cosmological expansion on local systems
F. I. Cooperstock, V. Faraoni, D. N. Vollick
Following renewed interest, the problem of whether the cosmological expansion affects the dynamics of local systems is reconsidered. The cosmological correction to the equations of…
A Singularity-Free Cosmological Model with a Conformally Coupled Scalar Field
S. S. Bayin, F. I. Cooperstock, V. Faraoni
We explore the possibility of describing our universe with a singularity--free, closed, spatially homogeneous and isotropic cosmological model, using only general relativity and a…
Laser Interferometric Detectors of Gravitational Waves
F. I. Cooperstock, V. Faraoni
A laser interferometric detector of gravitational waves is studied and a complete solution (to first order in the metric perturbation) of the coupled Einstein-Maxwell equations wit…