Results 101 to 110 of about 74,681 (258)

Quantum Big-Bounce as a phenomenology of RQM in the Mini-superspace

open access: yesPhysics Letters B
We investigate the emergence of a quantum Big-Bounce in the context of an isotropic Universe, filled by a self-interacting scalar field, which plays the role of a physical clock. The bouncing cosmology is the result of a scattering process, driven by the
Simone Lo Franco, Giovanni Montani
doaj   +1 more source

BACK-REACTION IN RELATIVISTIC COSMOLOGY [PDF]

open access: yesThe 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 ...
openaire   +3 more sources

Relativistic cosmological hydrodynamics

open access: yes, 1997
3 pages, latex, mprocl.sty; The Eighth Marcel Grossmann Meeting on General ...
Hwang, J., Noh, H.
openaire   +2 more sources

Dwarf Galaxies, MOND, and Relativistic Gravitation

open access: yesAdvances in Astronomy, 2010
MOND is a phenomenological modification of Newton's law of gravitation which reproduces the dynamics of galaxies, without the need for additional dark matter. This paper reviews the basics of MOND and its application to dwarf galaxies.
Arthur Kosowsky
doaj   +1 more source

Relativistic Fractal Cosmologies [PDF]

open access: yes, 1994
This article reviews an approach for constructing a simple relativistic fractal cosmology whose main aim is to model the observed inhomogeneities of the distribution of galaxies by means of the Lemaitre-Tolman solution of Einstein's field equations for spherically symmetric dust in comoving coordinates. This model is based on earlier works developed by
openaire   +2 more sources

Transverse Velocities in Real-Time Cosmology: Position Drift in Relativistic N-Body Simulations

open access: yesThe Open Journal of Astrophysics
The era of real-time cosmology has begun. It is now possible to directly measure the apparent drift of high-redshift astronomical sources across the sky $\textit{in real time}$.
Alexander Oestreicher   +3 more
doaj   +1 more source

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