Evidence for a disaggregation of the universe.

Alfonso-Faus, Antonio (2012). Evidence for a disaggregation of the universe.. "Astrophys Space Science", v. 337 (n. 1); pp. 367-372. ISSN 0004-640X.


Title: Evidence for a disaggregation of the universe.
  • Alfonso-Faus, Antonio
Item Type: Article
Título de Revista/Publicación: Astrophys Space Science
Date: August 2012
Volume: 337
Faculty: E.U.I.T. Aeronáutica (UPM)
Department: Aerotecnia [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Combining the kinematical definitions of the two dimensionless parameters, the deceleration q(x) and the Hubble t 0 H(x), we get a differential equation (where x=t/t 0 is the age of the universe relative to its present value t 0). First integration gives the function H(x). The present values of the Hubble parameter H(1) [approximately t 0 H(1)≈1], and the deceleration parameter [approximately q(1)≈−0.5], determine the function H(x). A second integration gives the cosmological scale factor a(x). Differentiation of a(x) gives the speed of expansion of the universe. The evolution of the universe that results from our approach is: an initial extremely fast exponential expansion (inflation), followed by an almost linear expansion (first decelerated, and later accelerated). For the future, at approximately t≈3t 0 there is a final exponential expansion, a second inflation that produces a disaggregation of the universe to infinity. We find the necessary and sufficient conditions for this disaggregation to occur. The precise value of the final age is given only with one parameter: the present value of the deceleration parameter [q(1)≈−0.5]. This emerging picture of the history of the universe represents an important challenge, an opportunity for the immediate research on the Universe. These conclusions have been elaborated without the use of any particular cosmological model of the universe

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Item ID: 15383
DC Identifier: http://oa.upm.es/15383/
OAI Identifier: oai:oa.upm.es:15383
Deposited by: Memoria Investigacion
Deposited on: 29 Aug 2013 10:51
Last Modified: 21 Apr 2016 15:26
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