宇宙速度场两点相关的暗晕模型描述
发布时间：2018-07-28 19:40
【摘要】：利用当前宇宙大尺度结构和星系形成领域流行的暗晕模型,对宇宙速度场两点相关函数进行精确的描述。暗晕模型能给出宇宙速度场无论是在线性还是非线性尺度上的估计,而且,模型中考虑了暗晕之间的相对运动,从而解决了在大尺度上模型的预言结果和数值模拟样本统计结果之间不自洽的矛盾。结合暗晕占据数模型,还可以把模型推广到描述星系本动速度两点相关函数上,这无疑给通过星系本动速度来对宇宙大尺度结构和星系形成及演化进行限制方面的研究提供了一个强大的工具,并指出了可能的努力方向。
[Abstract]:Using the popular dark halo model in the field of cosmic large-scale structure and galaxy formation, the two-point correlation function of cosmic velocity field is described accurately. The dark halo model can estimate the cosmic velocity field on both linear and nonlinear scales, and the relative motion between dark halos is considered in the model. Thus, the contradiction between the prediction results of the model and the statistical results of numerical simulation samples is solved on a large scale. Combined with the dark halo occupation number model, the model can also be extended to the two-point correlation function for describing the local velocity of galaxies. This provides a powerful tool for the study of the limitation of the large-scale structure of the universe and the formation and evolution of galaxies through the intrinsic velocity of galaxies, and points out the possible direction of efforts.
【作者单位】： 中国科学院上海天文台星系与宇宙学重点实验室;中国科学院研究生院;
【基金】：中国科学院研究生科技创新与社会实践资助专项 上海天文台青年人才基金
【分类号】：P159.5
，
本文编号：2151380
[Abstract]:Using the popular dark halo model in the field of cosmic large-scale structure and galaxy formation, the two-point correlation function of cosmic velocity field is described accurately. The dark halo model can estimate the cosmic velocity field on both linear and nonlinear scales, and the relative motion between dark halos is considered in the model. Thus, the contradiction between the prediction results of the model and the statistical results of numerical simulation samples is solved on a large scale. Combined with the dark halo occupation number model, the model can also be extended to the two-point correlation function for describing the local velocity of galaxies. This provides a powerful tool for the study of the limitation of the large-scale structure of the universe and the formation and evolution of galaxies through the intrinsic velocity of galaxies, and points out the possible direction of efforts.
【作者单位】： 中国科学院上海天文台星系与宇宙学重点实验室;中国科学院研究生院;
【基金】：中国科学院研究生科技创新与社会实践资助专项 上海天文台青年人才基金
【分类号】：P159.5
，
本文编号：2151380
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