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arXiv 0807.3140astro-ph
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未来暗能量探测器的互补性

Complementarity of Future Dark Energy Probes

Jiayu Tang, Filipe B. Abdalla, Jochen Weller

摘要:

近年来,大量的未来调查已经被建议限制暗能量的性质。在本文中,我们采用一个binning方法的状态方程因子“w”,并讨论如何未来的弱透镜,星系团计数,超新星和重子声学振荡调查约束状态方程在不同的红移。我们分析了一些有代表性的未来调查,即DES,PS1,WFMOS,PS4,EUCLID,SNAP和SKA,并执行主成分分析的“w”箱。我们还采用了普朗克宇宙微波背景测量剩余的宇宙学参数的先验。我们研究的红移一个特定的调查约束状态方程最好,有多少主成分显着确定。然后,我们指出哪些调查将是充分的补充。我们发现,弱透镜调查,如EUCLID,将约束状态方程最好,并能够约束的顺序的三个重要的模式。另一方面,重子声学振荡巡天提供了一个独特的机会来探测相对高红移的状态方程。

英文摘要:

In recent years a plethora of future surveys have been suggested to constrain the nature of dark energy. In this paper we adapt a binning approach to the equation of state factor ``w'' and discuss how future weak lensing, galaxy cluster counts, Supernovae and baryon acoustic oscillation surveys constrain the equation of state at different redshifts. We analyse a few representative future surveys, namely DES, PS1, WFMOS, PS4, EUCLID, SNAP and SKA, and perform a principal component analysis for the ``w'' bins. We also employ a prior from Planck cosmic microwave background measurements on the remaining cosmological parameters. We study at which redshifts a particular survey constrains the equation of state best and how many principal components are significantly determined. We then point out which surveys would be sufficiently complementary. We find that weak lensing surveys, like EUCLID, would constrain the equation of state best and would be able to constrain of the order of three significant modes. Baryon acoustic oscillation surveys on the other hand provide a unique opportunity to probe the equation of state at relatively high redshifts.

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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