期刊
ASTROPHYSICAL JOURNAL
卷 831, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/0004-637X/831/2/164
关键词
dark matter; galaxies: halos; large-scale structure of universe; methods: statistical
资金
- 973 Program [2015CB857002, 2015CB857005]
- NSFC [11522324, 11421303, 11233005, 11533006, 11320101002]
- Strategic Priority Research Program The Emergence of Cosmological Structures of the Chinese Academy of Sciences [XDB09010400]
- Fundamental Research Funds for the Central Universities
- NSF [AST-1517528]
- Supercomputing Center of University of Science and Technology of China
- Center for High Performance Computing, Shanghai Jiao Tong University
A method we developed recently for the reconstruction of the initial density field in the nearby universe is applied to the Sloan Digital Sky Survey Data Release 7. A high-resolution N-body constrained simulation (CS) of the reconstructed initial conditions, with 3072(3) particles evolved in a 500 h(-1) Mpc box, is carried out and analyzed in terms of the statistical properties of the final density field and its relation with the distribution of Sloan Digital Sky Survey galaxies. We find that the statistical properties of the cosmic web and the halo populations are accurately reproduced in the CS. The galaxy density field is strongly correlated with the CS density field, with a bias that depends on both galaxy luminosity and color. Our further investigations show that the CS provides robust quantities describing the environments within which the observed galaxies and galaxy systems reside. Cosmic variance is greatly reduced in the CS so that the statistical uncertainties can be controlled effectively, even for samples of small volumes.
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