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"Dark Energy" model of accelerated universe expansion gains
From: "Jonathan Thornburg [remove -animal to reply]"
Subject: "Dark Energy" model of accelerated universe expansion gains support Newsgroups: sci.astro.research References: Kent Paul Dolan wrote: The support is mostly of the "eliminating alternatives one by one" sort, but it's still of interest. http://www.physorg.com/news152374990.html For more details, see http://link.aps.org/doi/10.1103/PhysRevLett.101.251303 (subscription required, alas), or http://arxiv.org/abs/0809.3761 Authors: James P. Zibin, Adam Moss, and Douglas Scott Title: Can We Avoid Dark Energy? Abstract: The idea that we live near the center of a large, nonlinear void has attracted attention recently as an alternative to dark energy or modified gravity. We show that an appropriate void profile can fit both the latest cosmic microwave background and supernova data. However, this requires either a fine-tuned primordial spectrum or a Hubble rate so low as to rule these models out. We also show that measurements of the radial baryon acoustic scale can provide very strong constraints. Our results present a serious challenge to void models of acceleration. -- -- "Jonathan Thornburg [remove -animal to reply]" Dept of Astronomy, Indiana University, Bloomington, Indiana, USA "Washing one's hands of the conflict between the powerful and the powerless means to side with the powerful, not to be neutral." -- quote by Freire / poster by Oxfam |
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