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AlfonsoFaus, Antonio (2012). Evidence for a disaggregation of the universe.. "Astrophys Space Science", v. 337 (n. 1); pp. 367372. ISSN 0004640X. https://doi.org/10.1007/s1050901108067.
Title:  Evidence for a disaggregation of the universe. 

Author/s: 

Item Type:  Article 
Título de Revista/Publicación:  Astrophys Space Science 
Date:  August 2012 
ISSN:  0004640X 
Volume:  337 
Subjects:  
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
Item ID:  15383 

DC Identifier:  https://oa.upm.es/15383/ 
OAI Identifier:  oai:oa.upm.es:15383 
DOI:  10.1007/s1050901108067 
Official URL:  http://link.springer.com/article/10.1007/s1050901... 
Deposited by:  Memoria Investigacion 
Deposited on:  29 Aug 2013 10:51 
Last Modified:  21 Apr 2016 15:26 