期刊
ASTROPHYSICAL JOURNAL
卷 841, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/aa6bf8
关键词
galaxies: formation; galaxies: structure; methods: numerical
资金
- 973 Program [2015CB857002]
- National Science Foundation of China [11128306, 11121062, 11233005, 11073017, 11621303]
- Shanghai Committee of Science and Technology, China [12ZR1452800]
- NSFC [11522324, 11421303]
- key laboratory grant from the Office of Science and Technology, Shanghai Municipal Government [11DZ2260700]
- High Performance Computing Resource in the Core Facility for Advanced Research Computing at Shanghai Astronomical Observatory
- [NCET-11-0879]
The ELUCID project aims to build a series of realistic cosmological simulations that reproduce the spatial and mass distributions of the galaxies as observed in the Sloan Digital Sky Survey. This requires powerful reconstruction techniques to create constrained initial conditions (ICs). We test the reconstruction method by applying it to several N-body simulations. We use two medium-resolution simulations, which each produced three additional constrained N-body simulations. We compare the resulting friend-of-friend catalogs by using the particle indexes as tracers, and quantify the quality of the reconstruction by varying the main smoothing parameter. The cross-identification method we use proves to be efficient, and the results suggest that the most massive reconstructed halos are effectively traced from the same Lagrangian regions in the ICs. A preliminary time-dependence analysis indicates that high-mass-end halos converge only at a redshift close to the reconstruction redshift. This suggests that, for earlier snapshots, only collections of progenitors may be effectively cross-identified.
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