用宇宙视差和红移漂移区分虚模型和暗能量
Distinguishing Between Void Models and Dark Energy with Cosmic Parallax and Redshift Drift
摘要：
最近提出的两种技术，涉及测量宇宙视差和红移漂移，提供了新的方法来指导探测（在几年的时间跨度）宇宙的背景度量，因此揭示了暗能量难题。前者利用即将到来的高精度天体测量来观察或严格限制偏离中心的观测者的宇宙学各向异性，而后者采用高精度光谱学来独立测试宇宙的当前加速度。在本文中，我们表明，这两种方法可以打破LTB空洞模型和更传统的暗能量理论之间的简并性。使用不久的将来的观测任务盖亚和CODEX，我们表明，这种区别可能是在十年的过程中具有高置信度。
英文摘要：
Two recently proposed techniques, involving the measurement of the cosmic parallax and redshift drift, provide novel ways of directing probing (over a time-span of several years) the background metric of the universe and therefore shed light on the dark energy conundrum. The former makes use of upcoming high-precision astrometry measurements to either observe or put tight constraints on cosmological anisotropy for off-center observers, while the latter employs high-precision spectroscopy to give an independent test of the present acceleration of the universe. In this paper, we show that both methods can break the degeneracy between LTB void models and more traditional dark energy theories. Using the near-future observational missions Gaia and CODEX we show that this distinction might be made with high confidence levels in the course of a decade.
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。
