暗能量的射电探测——天籁计划简介

发布时间：2018-04-15 11:37

本文选题：暗能量 + cm　；参考：《中国科学:物理学力学天文学》2011年12期

【摘要】：宇宙中的中性氢原子产生波长为21cm的辐射,其强度在大尺度上正比于物质密度.通过射电观测这一辐射,可以获得宇宙中物质分布的大尺度结构.利用大尺度结构功率谱中的重子声波振荡信号作为标准尺,可以进行高精度的宇宙学测量,确定暗能量状态方程参数w,这提供了一种重要的暗能量观测手段.我国在射电天文及相关技术方面有一定基础,且国内即有电磁环境良好的站址,有很好的条件开展这方面的研究.如能及时着手,有可能在这一领域中取得领先,并在暗能量研究中取得突破.本文介绍了通过21cm巡天对暗能量进行观测的方法,并讨论了天籁计划具体实验设想.
[Abstract]:Neutral hydrogen atoms in the universe produce radiation at the wavelength of 21cm, the intensity of which is proportional to the density of matter on a large scale.The large scale structure of matter distribution in the universe can be obtained by radio observation of this radiation.The baryon acoustic wave oscillation signal in the power spectrum of large scale structure can be used as a standard scale to carry out high precision cosmological measurements and to determine the parameters of the dark energy equation of state w, which provides an important means of dark energy observation.There is a certain foundation in radio astronomy and related technology in our country, and there are good sites for electromagnetic environment in China, so there are good conditions to carry out the research in this field.If done in time, it is possible to take the lead in this field and make a breakthrough in dark energy research.In this paper, the method of observing dark energy by 21cm survey is introduced, and the experimental idea of EarthSound plan is discussed.
【作者单位】：中国科学院国家天文台;北京大学高能物理研究中心;
【基金】：国家天文台预研项目基金国家重点基础研究发展计划(编号:2007CB8154010) John Templeton Beyond Horizons基金国家自然科学基金(批准号:11073024)资助项目
【分类号】：P161

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