宇宙大尺度结构和原初扰动非高斯性研研究进展

发布时间：2018-04-09 19:36

本文选题：原初非高斯性　切入点：功率谱　出处：《天文学进展》2015年04期

【摘要】：宇宙微波背景辐射(CMB)探测和大尺度结构(LSS)巡天是两种研究宇宙演化的重要手段。近年来高精度的宇宙微波背景辐射实验和大尺度结构巡天可以对今天的宇宙学模型给出精确测量,比如宇宙曲率、暴胀模型参数和原初非高斯性等。宇宙大尺度结构的原初非高斯性揭示了在甚早期宇宙中引发大尺度结构的原初扰动的物理诱发机制,有效地对不同暴胀模型进行区分,是研究甚早期宇宙的有效工具和手段。但是最近的研究结果表明,很多大尺度结构巡天的数据被系统误差严重污染,如大气视宁度、天光背景等,这些误差导致由大尺度结构巡天数据给出的原初非高斯的研究结果与实际情况相差甚远。大尺度结构巡天数据的系统误差消除和它对限制宇宙原初非高斯性的改善,对更好地了解甚早期宇宙具有重要意义。
[Abstract]:Cosmic microwave background radiation (CMB) detection and large scale structure (LSS) survey are two important methods to study the evolution of the universe.In recent years high-precision cosmic microwave background radiation experiments and large-scale structural surveys can accurately measure today's cosmological models such as cosmic curvature inflation model parameters and primordial non-#china_person0#.The primordial non-#china_person0# nature of the large-scale structure of the universe reveals the physical inducement mechanism of the primordial disturbance of the large-scale structure in the very early universe. It is an effective tool and means to study the very early universe by effectively distinguishing different inflating models.However, recent studies have shown that many large scale structure survey data are seriously polluted by systematic errors, such as atmospheric apparent normalcy, sky background, and so on.These errors lead to the difference between the original and non-#china_person0# 's research results given by the large scale structure survey data and the actual situation.The elimination of systematic error of large-scale structured sky survey data and its improvement in limiting the primordial non-#china_person0# nature of the universe are of great significance for better understanding of the very early universe.
【作者单位】：北京师范大学天文系;
【基金】：国家自然科学基金(11422323)
【分类号】：P159.5

【相似文献】