Nearest neighbor vector analysis of SDSS DR5 galaxy distribution

作     者：Yongfeng Wu Weike Xiao Rongjun Mu David Batuski Andre Khalil 

作者机构：4Department of Mathematics University of Maine Orono USA American Physical Society Maryland USA Department of Astronautics Engineering Harbin Institute of Technology Harbin China Department of Physics University of Maine Orono USA 

出 版 物：《Natural Science》 (自然科学期刊（英文）)

年 卷 期：2013年第5卷第1期

页      面：47-51页

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

主　　题：Nearest Neighbor Distance Nearest Neighbor Vector Anisotropy SDSS DR5 Galaxy Distribution 

摘      要：We present the nearest neighbor distance (NND) analysis of SDSS DR5 galaxies. We give NND results for observed, mock and random sample, and discuss the differences. We find the observed sample gives us a significantly stronger aggregation characteristic than the random samples. Moreover, we investigate the direction of NND and find the direction has close relation with the size of the NND for the observed sample.