.png){kind=icon}
返回
Is dark energy evolving?
.png){kind=icon}
OA
AI
DOI：10.1088/1475-7516/2013/02/049.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
We look for evidence for the evolution in dark energy density by employing Principal Component Analysis (PCA). Distance redshift data from supernovae and baryon acoustic oscillations (BAO) along with WMAP7 distance priors are used to put constraints on curvature parameter Omega(k) and dark energy parameters. The data sets are consistent with a flat Universe. The constraints on the dark energy evolution parameters obtained from supernovae (including CMB distance priors) are consistent with a flat Lambda CDM Universe. On the other hand, in the parameter estimates obtained from the addition of BAO data the second principal component, which characterize a non-constant contribution from dark energy, is non-zero at 1 sigma. This could be a systematic effect and future BAO data holds key to making more robust claims.
Keyword:
dark energy theory
supernova type Ia - standard candles
baryon acoustic oscillations
期刊
IF:
5.9
论文数:
1.3W
被引数:
4.7W
机构
引用论文
Cosmography: Supernovae Union2, Baryon Acoustic Oscillation, observational Hubble data and Gamma ray bursts.png)
PHYSICS LETTERS B
OAAI
PHYSICS LETTERS BIF4.5
OAAI分享收藏SEVEN-YEAR WILKINSON MICROWAVE ANISOTROPY PROBE (WMAP) OBSERVATIONS: COSMOLOGICAL INTERPRETATION七年威尔金森微波各向异性探测器 (WMAP) 观测: 宇宙学解释OAAI
OAAI分享收藏Acoustic Features of Wood Duck (Aix Sponsa) Maternal Calls木鸭 (Aix Sponsa) 母体叫声的声学特征Behaviour
BehaviourIF0
PREAI
分享收藏
查看更多内容