Can a dust dominated universe have accelerated expansion? v4

Space/Science » in reply to Concerning the instantaneous mass and the extent of an expanding universe

LJK — 6/20/2006 9:43:21 PM (archived)

Astrophysics, abstract
astro-ph/0506449

From: Haavard Alnes [view email]

Date (v1): Mon, 20 Jun 2005 09:53:31 GMT (12kb)
Date (revised v2): Wed, 22 Jun 2005 08:37:39 GMT (12kb)

Date (revised v3): Fri, 9 Jun 2006 12:02:34 GMT (30kb)
Date (revised v4): Mon, 19 Jun 2006 10:12:59 GMT (30kb)

Can a dust dominated universe have accelerated expansion?

Authors: H. Alnes, M. Amarzguioui, O. Gron

Comments: 9 pages, 1 figure. v3: Paper shortened and updated. References added. v4: Minor LATEX problem fixed. Submitted to JCAP

Recently, there has been suggestions that the apparent accelerated expansion of the universe is due not to a cosmological constant, but rather to inhomogeneities in the distribution of matter. In this work, we investigate a specific class of inhomogeneous models that can be solved analytically, namely the dust-dominated Lemaitre-Tolman-Bondi universe models. We show that they do not permit accelerated cosmic expansion.

http://arxiv.org/abs/astro-ph/0506449

The whole thread (19 posts)

Can String Theory Explain Dark Energy? - ljk - 6/19/2006 7:08:11 PM
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      - On the similarity of Information Energy to Dark Energy - LJK - 6/20/2006 9:44:48 PM
      - Concerning the instantaneous mass and the extent of an expanding universe - LJK - 6/20/2006 9:39:21 PM
        
        Can a dust dominated universe have accelerated expansion? v4 - LJK - 6/20/2006 9:43:21 PM
        
        I'm not an astrophysicist - SDF - 6/20/2006 10:30:57 PM
        
        And I suspect - SDF - 6/20/2006 10:42:41 PM
        
        Well, Einstein didn't have any original ideas either. - SDF - 6/21/2006 4:32:49 AM
        
        re: Well, Einstein didn't have any original ideas either. - ljk - 6/21/2006 8:13:34 PM
        
        Good question - SDF - 6/22/2006 2:04:31 AM
        
        re: Good question - LJK - 6/22/2006 2:15:22 PM
        
        The issue of Dark Energy in String Theory - LJK - 7/5/2006 8:28:23 PM

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The whole thread (19 posts)