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Nearest neighbor vector analysis of SDSS DR5 galaxy distribution
American Physical Society, Maryland, USA;
Department of Astronautics Engineering, Harbin Institute of Technology, Harbin, China
Department of Astronautics Engineering, Harbin Institute of Technology, Harbin, China
Department of Physics, University of Maine, Orono, USA
4Department of Mathematics, University of Maine, Orono, USA
- 1 American Physical Society, Maryland, USA;
- 2 Department of Astronautics Engineering, Harbin Institute of Technology, Harbin, China
- 3 Department of Astronautics Engineering, Harbin Institute of Technology, Harbin, China
- 4 Department of Physics, University of Maine, Orono, USA
- 5 4Department of Mathematics, University of Maine, Orono, USA
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Abstract
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.
KeywordsNearest Neighbor DistanceNearest Neighbor VectorAnisotropySDSS DR5Galaxy Distribution
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