<script type="text/javascript">
<!--
document.write('<div id="oa_widget"></div>');
document.write('<script type="text/javascript" src="https://www.openaire.eu/index.php?option=com_openaire&view=widget&format=raw&projectId=undefined&type=result"></script>');
-->
</script>

COPY SCRIPT

For further information contact us at helpdesk@openaire.eu

Observational constraints on undulant cosmologies

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Other literature type 24 Apr 2006Embargo end date: 01 Jan 2005 Spain, United States Publisher:IOP PublishingJournal:Journal of Cosmology and Astroparticle Physics, volume 2,006, pages 8-8 (eissn: 1475-7516,

Authors: Barenboim, Gabriela; Mena Requejo, Olga; Quigg, Chris;

doi: 10.1088/1475-7516/2006/04/008 , 10.48550/arxiv.astro-ph/0510178

arXiv: http://arxiv.org/abs/astro-ph/0510178

handle: 10550/35400

Observational constraints on undulant cosmologies

- Summary
- Subjects
- Metrics

Abstract

In an undulant universe, cosmic expansion is characterized by alternating periods of acceleration and deceleration. We examine cosmologies in which the dark-energy equation of state varies periodically with the number of e-foldings of the scale factor of the universe, and use observations to constrain the frequency of oscillation. We find a tension between a forceful response to the cosmic coincidence problem and the standard treatment of structure formation.

19 pages, 12 figures in 19 files, uses iopart.cls, iopart10.clo; added references

Countries

Spain, United States

Related Organizations

Keywords

General Physics, High Energy Physics - Phenomenology, Astrophysics Astrophysics, High Energy Physics - Phenomenology (hep-ph), Universe, Acceleration, Astrophysics (astro-ph), FOS: Physical sciences, 71 Classical And Quantum Mechanics, Astrophysics

Impact byBIP!

	citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	10
	popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.	Average
	influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).	Average
	impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.	Top 10%