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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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01 Mar 2019-viXra
TL;DR: In this article, the fundamental constants namely vacuum permeability and permittivity, which comprise the numerical definition of the speed of light in vacuum, are determined, and derived for both a new fundamental composite speed in vacuum and vacuum impedance are performed.
Abstract: Here, the fundamental constants namely vacuum permeability and permittivity, which comprise the numerical definition of the speed of light in vacuum, are determined. They are found to be composites correlated to Planck’s constant, Wien’s constant and the mass energy of the cosmic microwave background. Derivations for both a new fundamental composite speed of light in vacuum and vacuum impedance are performed. Furthermore, this newly suggested definition is correlated to a confined quantized radiation spectrum of the cosmic particle horizon.

3 citations

Journal ArticleDOI
TL;DR: In this paper, the perturbation spectra of scalar fields not affecting the evolution of the background during the fluctuation were examined and whether they can be interesting and responsible for the structure formation of the observable universe.
Abstract: The possibility that the Universe may have a fundamental and positive cosmological constant has motivated an interesting cosmological model, in which initially the Universe is in a cosmological constant sea, then the local quantum fluctuations violating the null energy condition create some islands with matter and radiation, which under certain conditions might correspond to our observable universe. We in this paper study the perturbation spectra of scalar fields not affecting the evolution of background during the fluctuation. We will examine whether they can be interesting, and responsible for the structure formation of the observable universe.

3 citations

Journal ArticleDOI
TL;DR: In this article, a closed model of the universe was constructed according to the assumption that very minor fraction of the dark energy transfers so slowly to matter and radiation, and the cosmological parameter is no longer fixed but represents a slowly decreasing function with time.
Abstract: A closed model of the universe was constructed according to the assumption that very minor fraction of the dark energy transfers so slowly to matter and radiation. The cosmological parameter is no longer fixed but represents so slowly decreasing function with time. In this model the universe expands to maximum limit at tme = 26.81 Gyr, then it will contract to a big crunch at tbc = 53.62 Gyr. Observational tests to the closed cosmic model were illustrated. Distributions of the universe expansion and contraction speed established in this model which indicated that the expansion speed in the early universe is appreciably high, then it will decrease rapidly until it vanishes at tme. However, the contraction speed of the universe increases continuously until the time just before tbe. Distributions of the universe expansion and contraction acceleration were performed empirically which confirmed the previous result were performed empirically. In the closed cosmic model the universe history can be categorized into six main stages, these are the first radiation epoch, the first matter epoch, the first dark energy epoch, the last dark energy epoch, the last matter epoch and the last radiation epoch. Distributions of the density parameters of the radiation, matter, dark energy and the total density as well as the distributions of temperature of the radiation and non-relativistic matter were all investigated in this model at all epochs of the universe.

3 citations

Journal ArticleDOI
TL;DR: In this article, the authors tried to invoke relation between entropy and time in space-time with new dimension and also provided how Hubble's constant related with entropy of universe Discussed about how entropy behaves at different temperatures and at different time values of universe We showed that age of universe is equivalent to Hubble’s constant And showed how naturally entropy arrives from the manipulations in gravity from Einstein's equation “00” And from these result s we concluded that universe is isotropic, homogeneous with negative space curvature.
Abstract: Influenced with symmetry of entropy and time in nature, we tried to invoke relation between entropy and time in space- time with new dimension And also provided how Hubble’s constant related with entropy of universe Discussed about how entropy of universe behaves at different temperatures and at different time values of universe We showed that age of universe is equivalent to Hubble’s constant And showed how naturally entropy arrives from the manipulations in gravity from Einstein’s equation “00” And from these result s we concluded that universe is isotropic, homogeneous with negative space curvature ie K= -1 but not flat K=0 (which doesn’t explain acceleration and deceleration of universe) From these results of gravity, entropy, temperature and time we discussed the genesis of time And proposed that at absolute zero temperature universe survives as a superconductor and that particular temperature is called as “Critical Absolute Temperature (T AB ) And genesis of time occurs at first fluxon repulsion in the absolute zero temperature of universe

3 citations

01 Jan 2014
TL;DR: The Dynamic Steady State Universe (DSSU) model as mentioned in this paper is based on the concept of space expanding in a non-expanding universe, and it has been shown to have a similar distance curve as the flat ΛCDM model.
Abstract: Cosmologists have long sought to remove the speed-of-light term from the equation for cosmic distance (the cosmic redshift-distance law). Within the context of expanding-universe models, the endeavor required determining the scaling factor R and its past, present and future rates of change. No one has ever succeeded. In fact, theorists have found it necessary to add various density parameters (Ω) to an increasingly complex distance equation. The approach in this paper is to reject the unscientific extrapolation of general relativity —the extrapolation that leads to universe-wide expansion— and, instead, to recognize that general relativity is, as originally intended, strictly a local theory; and acknowledge that the universe, in agreement with all observations, is cellular and non-expanding. I use the Dynamic Steady State Universe (DSSU) which is a cosmic model sui generis and is based on the concept of space expanding in a non-expanding universe . A cosmic redshift-distance relation is easily derived and is not dependent on R, not on Ω, not on c, and not on H0. Remarkably it gives practically the same distance curve as the currently favored model —the flat ΛCDM ( ΩM = 0.25, ΩΛ = 0.75) version of an expanding universe.

3 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202320
202247
20216
202010
201910
201814