红移z～1的Lyman Break星系两点相关函数

发布时间：2018-05-26 02:14

本文选题：大尺度结构 + 宇宙学距离　；参考：《上海师范大学》2013年硕士论文

【摘要】：两点相关函数是研究星系大尺度分布的一种重要工具。本文所使用的数据是由陈竹等（2013）[35]根据Burgarella等（2007）[36]筛选出的LBG（Lyman breakgalaxy）候选星系样本中，红移z～1的LBG候选星系。样本星系在NUV波段上，AB视星等亮于24.2等的完备率约为83%，极限星等为26.2等；我们根据样本拟合出其Schechter光度函数，然后根据光度函数对样本星系进行加权，以改正其Malmquist偏差；最后根据其权重计算样本星系红移空间内的两点相关函数。考虑其边界效应后，在小尺度上进行幂律谱拟合，在Ω_L=0.7，Ω_m=0.3的平坦ΛCDM宇宙学模型下，得到两点相关函数的指数γ为-1.83+0.09;-0.09，，相关长度r_0为5.31+1.61;-1.67h^(-1)Mpc。
[Abstract]:The two-point correlation function is an important tool for studying the large-scale distribution of galaxies. The data used in this paper are the LBG(Lyman breakGalaxy Y candidate galaxies selected by Chen Zhu et al. 2013) [35] according to Burgarella et al. 2007) [36]. On the NUV band, the complete ratio of the sample galaxies is about 83 and the limit magnitude is 26.2.We fit its Schechter photometric function according to the sample, and then weighted the sample galaxies according to the photometric function to correct their Malmquist deviation. Finally, the two-point correlation function in the redshift space of the sample galaxy is calculated according to its weight. After considering the boundary effect, the power law spectrum fitting is carried out on a small scale. Under the flat CDM cosmological model of 惟 _ S _ L _ (0.7) and 惟 _ S _ m _ (0), the exponent 纬 of the two-point correlation function is -1.83 0.09 ~ 0.09 and the correlation length r _ S _ 0 is 5.31 1.61 ~ 1.67 h ~ (-1) Mpc.
【学位授予单位】：上海师范大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P15

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