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arXiv 0908.3186astro-ph.CO
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从宇宙学数据的全球分析中没有暗能量动力学的证据

No Evidence for Dark Energy Dynamics from a Global Analysis of Cosmological Data

Paolo Serra, Asantha Cooray, Daniel E. Holz, Alessandro Melchiorri, Stefania Pandolfi, Devdeep Sarkar

摘要:

我们使用主成分分析的一个变体来研究暗能量状态方程w(z)的可能的时间演化。利用Ia型超新星、宇宙微波背景、重子声学振荡、综合萨克斯-沃尔夫效应、星系团簇和弱透镜效应的最新数据,我们将w(z)限制在多个红移区间中。与最近的其他分析不同,我们没有发现演化暗能量的重要证据;数据仍然与宇宙学常数完全一致。我们还研究了状态方程的时间演化在多大程度上受到当前和未来几代调查(如普朗克和联合暗能量任务)的约束。

英文摘要:

We use a variant of principal component analysis to investigate the possible temporal evolution of the dark energy equation of state, w(z). We constrain w(z) in multiple redshift bins, utilizing the most recent data from Type Ia supernovae, the cosmic microwave background, baryon acoustic oscillations, the integrated Sachs-Wolfe effect, galaxy clustering, and weak lensing data. Unlike other recent analyses, we find no significant evidence for evolving dark energy; the data remains completely consistent with a cosmological constant. We also study the extent to which the time-evolution of the equation of state would be constrained by a combination of current- and future-generation surveys, such as Planck and the Joint Dark Energy Mission.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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