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The topology of general cosmological models*
Classical and Quantum Gravity, 2022 Abstract Is the Universe finite or infinite, and what shape does it have? These fundamental questions, of which relatively little is known, are typically studied within the context of the standard model of cosmology where the Universe is assumed to be homogeneous and isotropic.
Gregory J Galloway +2 more
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Constraints on unified models for dark matter and dark energy using H(z) [PDF]
, 2011 Fabris JC, de Oliveira PLC, Velten H. Constraints on unified models for dark matter and dark energy using H(z). European Physical Journal C. 2011;71(10): 1773.The differential age data of astrophysical objects that have evolved passively during the ...
Hermano Velten +9 more
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Observational Cosmology in Macroscopic Gravity [PDF]
, 2013 This version deposited at arXiv 25-10-12 arXiv:1209.1085v2. Subsequently published in Journal of Cosmology and Astroparticle Physics as Timothy Clifton et al JCAP10(2012)044 doi:10.1088/1475-7516/2012/10/044.
Hoogen, RVD, Clifton, T, Coley, A
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Neutrinos in Cosmological Models [PDF]
Progress of Theoretical Physics, 1980 Observations show that the Universe is very nearly homogeneous and isotropic on a large scale. It follows, that on a large scale, the Universe may be approximately described by one of the Robertson-Walker models. These models have the property o£ possessing exact spatial homogeneity and isotropy about each event.
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Rip Cosmology via Inhomogeneous Fluid
Galaxies, 2013 The conditions for the appearance of the Little Rip, Pseudo Rip and Quasi Rip universes in the terms of the parameters in the equation of state of some dark fluid are investigated. Several examples of the Rip cosmologies are investigated.
Alexander V. Timoshkin +2 more
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ANALOGUE MODELS FOR FRW COSMOLOGIES [PDF]
International Journal of Modern Physics D, 2003 It is by now well known that various condensed matter systems may be used to mimic many of the kinematic aspects of general relativity, and in particular of curved-spacetime quantum field theory. In this essay we will take a look at what would be needed to mimic a cosmological spacetime — to be precise a spatially flat FRW cosmology — in one of these ...
CARLOS BARCELO +2 more
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Cosmological Model with Ω M -Dependent Cosmological Constant [PDF]
General Relativity and Gravitation, 2003 10 ...
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Primordial black holes in non-linear perturbation theory [PDF]
, 2009 PhDThe thesis begins with a study of the origin of non-linear cosmological fluctuations. In particular, a class of models of multiple field inflation are considered, with specific reference to those cases in which the non-Gaussian correlation functions
Hidalgo-Cuellar, Juan Carlos
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A Bias-free Cosmological Analysis with Quasars Alleviating H 0 Tension
The Astrophysical Journal Supplement Series, 2023 Cosmological models and their parameters are widely debated because of theoretical and observational mismatches of the standard cosmological model, especially the current discrepancy between the value of the Hubble constant, H _0 , obtained by Type Ia ...
Aleksander Łukasz Lenart +4 more
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