Results 11 to 20 of about 400,960 (288)
N-body methods for relativistic cosmology [PDF]
, 2014 We present a framework for general relativistic N-body simulations in the regime of weak gravitational fields. In this approach, Einstein's equations are expanded in terms of metric perturbations about a Friedmann-Lema\^itre background, which are assumed
Adamek, Julian +2 more
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Newtonian versus relativistic cosmology [PDF]
, 2012 We show how the relativistic matter and velocity power spectra behave in different gauges. We construct a new gauge where both spectra coincide with Newtonian theory on all scales.
Flender, Samuel F., Schwarz, Dominik J.
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Physico-mathematical foundations of relativistic cosmology [PDF]
, 2013 I briefly present the foundations of relativistic cosmology, which are, General Relativity Theory and the Cosmological Principle. I discuss some relativistic models, namely, "Einstein static universe" and "Friedmann universes".
Soares, Domingos
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BACK-REACTION IN RELATIVISTIC COSMOLOGY [PDF]
The Thirteenth Marcel Grossmann Meeting, 2013 We introduce the concept of back-reaction in relativistic cosmological modeling. Roughly speaking, this can be thought of as the difference between the large-scale behavior of an inhomogeneous cosmological solution of Einstein's equations, and a homogeneous and isotropic solution that is a best-fit to either the average of observables or dynamics in ...
T. Clifton
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Regional averaging and scaling in relativistic cosmology [PDF]
, 2002 Averaged inhomogeneous cosmologies lie at the forefront of interest, since cosmological parameters like the rate of expansion or the mass density are to be considered as volume-averaged quantities and only these can be compared with observations.
Buchert, Thomas, Carfora, Mauro
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Lagrangian theory of structure formation in relativistic cosmology: Lagrangian framework and definition of a nonperturbative approximation [PDF]
, 2012 In this paper, we present a Lagrangian framework for the description of structure formation in general relativity, restricting attention to irrotational dust matter.
Thomas Buchert, Matthias Ostermann
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ON THE FOUNDATIONS OF RELATIVISTIC COSMOLOGY [PDF]
Proceedings of the National Academy of Sciences, 1929 H. P. Robertson
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The Poisson equation at second order in relativistic cosmology [PDF]
, 2013 We calculate the relativistic constraint equation which relates the curvature perturbation to the matter density contrast at second order in cosmological perturbation theory.
J. C. Hidalgo +5 more
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Relativistic Cosmology and the Pioneers Anomaly [PDF]
, 2012 NASA spacecrafts has suffered from three anomalies. The Pioneers spacecrafts were decelerated, and their spin when not disturbed, was declining. On the other hand, fly-bys for gravity assists, appeared with extra speeds, relative to infinity.
Marcelo Samuel Berman +1 more
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Lagrangian theory of structure formation in relativistic cosmology III: gravitoelectric perturbation and solution schemes at any order [PDF]
, 2015 The relativistic generalization of the Newtonian Lagrangian perturbation theory is investigated. In previous works, the first-order trace solutions that are generated by the spatially projected gravitoelectric part of the Weyl tensor were given together ...
A. Alles +3 more
semanticscholar +1 more source