On using the WMAP distance priors in constraining the time evolving equation of state of dark energy

Date
Authors
Li, Hong
Xia, Jun-Qing
Zhao, Gong-Bo
Fan, Zu-Hui
Zhang, Xinmin
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
Recently, the WMAP group has published their five-year data and considered the constraints on the time evolving equation of state of dark energy for the first time from the WMAP distance information. In this paper, we study the effectiveness of the usage of these distance information and find that these compressed CMB information can give similar constraints on dark energy parameters compared with the full CMB power spectrum if dark energy perturbations are included, however, once incorrectly neglecting the dark energy perturbations, the difference of the results are sizable.
Comment: 4 pages, 3 figures, 2 tables
Keywords
Astrophysics
Citation
Collections