Results 11 to 20 of about 6,695,532 (296)
Effect of Inhomogeneity on Cosmological Models [PDF]
Proceedings of the National Academy of Sciences of the United States of America, 1934 Reprint of [\textit{R. C. Tolman}, Proc. Nat. Acad. Sci. USA 20, 169-176 (1934; Zbl 0009.04103)], with an introduction and a biography of Richard Chace Tolman by Andrzej Krasiński.
Richard C Tolman, R C Tolman
exaly +4 more sources
The dynamics of cosmological scenarios inspired by quantum gravity [PDF]
, 2006 PhDIn this thesis we study the dynamics of cosmological scenarios inspired by quantum gravity. Part I investigates novel features of the semi-classical regime of homogeneous and isotropic loop quantum cosmology.
Mulryne, David James
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Metaphysics of cosmological models
HTS Teologiese Studies/Theological Studies, 2023 This article aims to address the metaphysical dimension of cosmological models, be they mythological, philosophical, religious or modern scientific, using multidisciplinary and transdisciplinary methodology.
Vasile Chira
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The Astrophysical Journal, 2023 We propose a model of the Universe (dubbed η CDM) featuring a controlled stochastic evolution of the cosmological quantities that is meant to render the effects of small deviations from homogeneity/isotropy on scales of 30–50 h ^−1 Mpc at late cosmic ...
Andrea Lapi +6 more
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Stability Of Cosmological Models [PDF]
Symposium - International Astronomical Union, 1995 The stability problem in cosmology is studied using the equations of geodesic deviation. General conditions for stability are obtained. The method is applied to a number of cosmological models, resulting from different field theories. The results are compared with those obtained from FRW -models.
Wanas, M. I., Bakry, M. A.
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Spherically Symmetric Exact Vacuum Solutions in Einstein-Aether Theory
Universe, 2021 We study spherically symmetric spacetimes in Einstein-aether theory in three different coordinate systems, the isotropic, Painlevè-Gullstrand, and Schwarzschild coordinates, in which the aether is always comoving, and present both time-dependent and time-
Jacob Oost +2 more
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Constraining inflationary scenarios with braneworld models and second order cosmological perturbations [PDF]
, 2010 PhDInflationary cosmology is the leading explanation of the very early universe. Many different models of inflation have been constructed which fit current observational data.
Huston, Ian
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COSMOLOGICAL MODEL SELECTION [PDF]
International Journal of Modern Physics A, 2008 We give an overview of the recent progress in the field of cosmological model selection. Model selection statistics, such as those based on information theory and on Bayesian statistics are introduced and discussed. In the Bayesian framework, the marginalised model likelihood, or evidence, is the primary model selection statistic.
Mukherjee, Pia, Parkinson, David
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On model selection in cosmology [PDF]
SciPost Physics Lecture Notes, 2019 We review some of the common methods for model selection: the goodness of fit, the likelihood ratio test, Bayesian model selection using Bayes factors, and the classical as well as the Bayesian information theoretic approaches. We illustrate these different approaches by comparing models for the expansion history of the Universe.
Kerscher, Martin, Weller, Jochen
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Cosmological Constant from Boundary Condition and Its Implications beyond the Standard Model
Universe, 2023 Standard cosmology has long been plagued by a number of persistent problems. The origin of the apparent acceleration of the cosmic expansion remains enigmatic.
Jan O. Stenflo
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