Hubble parameter measurement constraints on dark energy

K-REx Repository

Show simple item record

dc.contributor.author Farooq, Omer
dc.contributor.author Mania, Data
dc.contributor.author Ratra, Bharat V.
dc.date.accessioned 2013-05-22T20:46:58Z
dc.date.available 2013-05-22T20:46:58Z
dc.date.issued 2013-02-01
dc.identifier.uri http://hdl.handle.net/2097/15847
dc.description.abstract We use 21 Hubble parameter versus redshift data points, from Simon et al. (2005), Gazta~naga et al. (2009), Stern et al. (2010), and Moresco et al. (2012a), to place constraints on model parameters of constant and time-evolving dark energy cosmologies. The inclusion of the 8 new Moresco et al. (2012a) measurements results in H(z) constraints more restrictive than those derived by Chen & Ratra (2011b). These constraints are now almost as restrictive as those that follow from current Type Ia supernova (SNIa) apparent magnitude versus redshift data (Suzuki et al. 2012), which now more carefully account for systematic uncertainties. This is a remarkable result. We emphasize however that SNIa data have been studied for a longer time than the H(z) data, possibly resulting in a better estimate of potential systematic errors in the SNIa case. A joint analysis of the H(z), baryon acoustic oscillation peak length scale, and SNIa data favors a spatially-flat cosmological model currently dominated by a time-independent cosmological constant but does not exclude slowly-evolving dark energy. en_US
dc.language.iso en_US en_US
dc.relation.uri http://doi.org/10.1088/0004-637X/764/2/138 en_US
dc.rights This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). en_US
dc.rights.uri http://rightsstatements.org/vocab/InC/1.0/
dc.subject Cosmological parameters en_US
dc.subject Cosmology observations en_US
dc.subject Dark energy en_US
dc.title Hubble parameter measurement constraints on dark energy en_US
dc.type Article (author version) en_US
dc.date.published 2013 en_US
dc.citation.doi 10.1088/0004-637X/764/2/138 en_US
dc.citation.issue 2 en_US
dc.citation.jtitle Astrophysical Journal en_US
dc.citation.spage 138 en_US
dc.citation.volume 764 en_US
dc.contributor.authoreid ratra en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record

This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). Except where otherwise noted, the use of this item is bound by the following: This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Search K-REx


Advanced Search

Browse

My Account

Statistics








Center for the

Advancement of Digital

Scholarship

cads@k-state.edu