Results 11 to 20 of about 20,590 (312)
Collapse Models and Cosmology [PDF]
, 2020 minor typo in equation (30) corrected, conclusions and results ...
Martin, Jérôme, Vennin, Vincent
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Errant Man: The Importance of Cosmological Models in Culture [PDF]
Философия и космология, 2019 The author considers the meanings of the term “errant man” in the paper. The birth of man is his abandonment in being and wandering in it. It is important that wandering in being have direction, the source that drives man, forms the authenticity ...
Iryna Dobroskok
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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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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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Polynomial Affine Model of Gravity in Three-Dimensions
Universe, 2022 In this work, we explore a three-dimensional formulation of the polynomial affine model of gravity, which is a model that extends general relativity by relaxing the equivalence principle through the exclusion of the metric from the set of fundamental ...
Oscar Castillo-Felisola +6 more
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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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Cosmological Tensions and the Transitional Planck Mass Model
The Astrophysical Journal, 2023 In this follow-up analysis, we update previous constraints on the transitional Planck mass (TPM) modified gravity model using the latest version of EFTCAMB and provide new constraints using South Pole Telescope (SPT) and Planck anisotropy data along with
Joshua A. Kable +3 more
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Unified Dark Matter models with fast transition [PDF]
, 2010 We investigate the general properties of Unified Dark Matter (UDM) fluid models where the pressure and the energy density are linked by a barotropic equation of state (EoS) p = p(ρ) and the perturbations are adiabatic.
Davide Pietrobon +12 more
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Crossing of Phantom Divide Line in Model of Interacting Tsallis Holographic Dark Energy
Universe, 2022 We consider a Tsallis holographic dark energy model with interaction between dark energy and matter. The density of dark energy is taken as ρd∼3C2/L4−2γ, where C, γ are constants. The event horizon is chosen as the characteristic scale L.
Artyom V. Astashenok +1 more
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COSMOLOGICAL PERTURBATIONS AND THE RUNNING COSMOLOGICAL CONSTANT MODEL [PDF]
International Journal of Modern Physics D, 2012 We study the matter density fluctuations in the running cosmological constant (RCC) model using linear perturbations in the longitudinal gauge. Using this observable, we calculate the growth rate of structures and the matter power spectrum, and compare these results to SDSS data and the available data for linear growth rate.
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