136 citations · 459 across the 6 of their papers we have counts for
Showing astro-phShow all
3 papers · 1 filter
astro-ph1996★ 127 cited
Newtonian Cosmology in Lagrangian Formulation: Foundations and Perturbation Theory
Juergen Ehlers, Thomas Buchert
The ``Newtonian'' theory of spatially unbounded, self--gravitating, pressureless continua in Lagrangian form is reconsidered. Following a review of the pertinent kinematics, we pre…
astro-ph1995★ 113 cited
Averaging inhomogeneous Newtonian cosmologies
Thomas Buchert, Juergen Ehlers
Idealizing matter as a pressureless fluid and representing its motion by a peculiar--velocity field superimposed on a homogeneous and isotropic Hubble expansion, we apply (Lagrangi…
astro-ph1994★ 136 cited
Light Propagation in Arbitrary Spacetimes and the Gravitational Lens Approximation
Stella Seitz, Peter Schneider, Juergen Ehlers
We reformulate the transport equation which determines the size, shape and orientation of infinitesimal light beams in arbitrary spacetimes. The behaviour of such light beams near…