Chinese Astronomers Reveal Evidence of Dynamical Dark Energy

爱因斯坦错了?国家天文台研究团队发现动力学暗能量证据
时间:2017-09-08 单词数:3630

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导读:对于宇宙间神秘的暗能量,科学研究有了最新突破。中国科学院国家天文台的一支研究团队近日发现了暗能量随时间演化的证据,这一发现表明,暗能量的本质有可能不是爱因斯坦百年前提出的“宇宙学常数”。

爱因斯坦错了?国家天文台研究团队发现动力学暗能量证据_最新英语新闻

An international team led by Prof. Gong-Bo Zhao of National Astronomical Observatories of China (NAOC) revealed an evidence of dynamical dark energy using the latest astronomical observations. This discovery suggests that the nature of dark energy may not be the cosmological constant introduced by Albert Einstein 100 years ago, which is crucial for the study of dark energy.

由中国国家天文台的赵公博教授领导的国际研究小组利用最新的天文观测数据,提出了一种动力学暗能量新证据。暗能量的本质有可能不是爱因斯坦百年前提出的“宇宙学常数”,这对于研究暗能量至关重要。

This work has been published online in the world-renowned science journal of Nature Astronomy on August 28th, 2017 (Beijing time), with a News & Views article written by a world expert on cosmology published on September 5th.

这项工作于2017年8月28日在世界著名的自然天文学科学杂志上发表,并于9月5日刊发国际知名学者撰写的解读文章。

Revealing the nature of dark energy is one of key goals of modern sciences. The physical property of dark energy is represented by its Equation of State (EoS), which is the ratio of pressure and energy density of dark energy. In the traditional LCDM model, dark energy is essentially the cosmological constant, i.e., the vacuum energy, with a constant EoS of -1.In this model, dark energy has no dynamical features.

揭示暗能量的本质是现代科学的主要目标之一。暗能量的物理性质体现在其“状态方程”中,即暗能量的压强与能量密度的比值。在传统的真空能—冷暗物质(LCDM)宇宙学标准模型中,暗能量是爱因斯坦在1917年提出的“宇宙学常数”,即真空能,其状态方程为值为-1的常数。在此模型中,暗能量不具有任何动力学性质。

In 2016, a team within the SDSS-III (BOSS) collaboration led by Prof. Gong-Bo Zhao performed a successful measurement of the Baryonic Acoustic Oscillations (BAO) at multiple cosmic epochs with a high precision (Zhao et al., 2017, MNRAS, 466, 762).

2016年,赵公博曾带领国际大型星系巡天“斯隆数字巡天三期(重子振荡光谱巡天)”合作组,利用最新观测数据和新方法,在宇宙演化的多个时期,以高精度测量得到了重子声波振荡信号。

Based on this measurement and a method developed by Zhao for dark energy studies, the Zhao team found an evidence of dynamical dark energy at a significance level of 3.5 sigma. This suggests that the nature of dark energy may not be the vacuum energy, but some kind of dynamical field.

这一测量也成为此次研究突破的基础,研究人员在3.5个标准差水平发现了暗能量状态方程随时间演化的证据。这表明暗能量的性质可能不是真空能,而是某种动力场。

The dynamics of dark energy needs to be confirmed by next-generation astronomical surveys. In the next five to ten years, the world largest galaxy surveys including eBOSS (Zhao serves as a working group co-chair for eBOSS), DESI, PFS (NAOC staff are DESI and PFS members) and so on will provide observables which may be key to unveil the mystery of dark energy.

暗能量的动力学性质还需要下一代大型巡天观测的证认,期待在未来5年至10年内,世界上最大型的星系巡天“扩展重子振荡光谱巡天”、“暗能量光谱仪”、“主焦点光谱仪”等项目将帮助人类揭开暗能量之谜。

Dr. Yuting Wang and Mr. Hanyu Zhang at NAOC have contributed to this work as key co-authors. This work was supported by NSFC, Chinese Academy of Sciences, and a Royal Society Newton Advanced Fellowship.

王玉婷博士和国家天文台的张寒雨共同参与了此项研究。这项工作得到了国家自然科学基金、中国科学院和皇家学会牛顿高级研究院的支持。

来源:爱语吧爱语吧作者:Penny

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