Exploring parameter constraints on quintessential dark energy: The pseudo-Nambu-Goldstone-boson model

被引：32

作者：

Abrahamse, Augusta ^{[1
]}

Albrecht, Andreas ^{[1
]}

Barnard, Michael ^{[1
]}

Bozek, Brandon ^{[1
]}

机构：

[1] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA

来源：

PHYSICAL REVIEW D | 2008年 / 77卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.77.103503

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the constraining power of future dark energy experiments for pseudo-Nambu-Goldstone-boson (PNGB) quintessence. Following the Dark Energy Task Force (DETF) methodology, we forecast data for three experimental stages: Stage 2 represents in-progress projects relevant to dark energy; Stage 3 refers to medium-sized experiments; Stage 4 comprises larger projects. We determine the posterior probability distribution for the parameters of the PNGB model using Markov Chain Monte Carlo analysis. Utilizing data generated on a Lambda CDM cosmology, we find that the relative power of the different data stages on PNGB quintessence is roughly comparable to the DETF results for the w(0) - w(a) parametrization of dark energy. We also generate data based on a PNGB cosmological model that is consistent with a Lambda CDM fiducial model at Stage 2. We find that Stage 4 data based on this PNGB fiducial model will rule out a cosmological constant by at least 3 sigma.

引用

页数：13

共 30 条

[1]

ALBRECHT A, ARXIVASTROPH0609591

[2] Evaluating dark energy probes using multidimensional dark energy parameters [J].