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Particle horizon
About: Particle horizon is a research topic. Over the lifetime, 2096 publications have been published within this topic receiving 69137 citations.
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TL;DR: In this paper, the authors considered the transition from annihilation of matter to deflation in the collapse and from inflation to creation of matter in the birth of a new universe in another space-time since beyond the event horizon the time coordinate is inextensible for an external observer.
6 citations
TL;DR: In this article, the authors investigated the validity of the generalized second law of thermodynamics of the universe bounded by the event horizon in a homogeneous and isotropic model with perfect fluid in one case and in another case with a holographic model.
Abstract: In this paper, we investigate the validity of the generalized second law of thermodynamics of the universe bounded by the event horizon. Here we consider homogeneous and isotropic model of the universe filled with perfect fluid in one case and in another case holographic model of the universe has been considered. In the third case the matter in the universe is taken in the form of non-interacting two fluid system as holographic dark energy and dust. Here we study the above cases in the Modified gravity, f(R) gravity.
6 citations
TL;DR: In this paper, a new equation for the density contrast is derived in the framework of reexamined Newtonian cosmology if we take into account adiabatic matter creation in the universe.
Abstract: A new equation for the density contrast is derived in the framework of reexamined Newtonian cosmology if we take into account adiabatic matter creation in the universe. The age of the universe and the reach of non linear regime of the density contrast are usually treated separately in the literature and this may leadtocontroversial conclusions regarding the most adequate scenario to describe the universe. We relate the age of the universe and the growing mode of the density contrast by introducing a variable x that relates both of them, so that both aspects are treated simultaneously. We apply this procedure to the Friedmann type model where the source of particle production is Y = 3nbH.
6 citations
TL;DR: In this article, a model where the inflationary phase emerges as a response to protect the Fischler-Susskind holographic bound is described, and conditions under which it is possible to obtain an additional exponential expansion phase as those currently observed are given.
Abstract: A model where the inflationary phase emerges as a response to protect the Fischler-Susskind holographic bound is described A two fluid model in a closed universe inflation picture is assumed, and a discussion on conditions under which is possible to obtain an additional exponential expansion phase as those currently observed is given
6 citations
TL;DR: In this paper, the authors identify additional flaws in the most recent claims of the properties of the Cosmic Horizon in the presence of phantom energy, simply demonstrating that it does not act as a horizon, and that its limiting of our view of the universe is a trivial statement.
Abstract: There has been a recent spate of papers on the Cosmic Horizon, an apparently fundamental, although unrecognised, property of the universe. The misunderstanding of this horizon, it is claimed, demonstrates that our determination of the cosmological makeup of the universe is incorrect, although several papers have pointed out key flaws in these arguments. Here, we identify additional flaws in the most recent claims of the properties of the Cosmic Horizon in the presence of phantom energy, simply demonstrating that it does not act as a horizon, and that its limiting of our view of the universe is a trivial statement.
5 citations