1997/10/31 by Y. P. Jing, Yasushi Suto · 4 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics #Cluster analysis #Cold dark matter #Dark matter #Dark matter halo #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Halo #Physics #Radio Astronomy Observations and Technology #Statistics #Universe #astro-ph
paper · pdf · doi:10.1086/311163
published as Astrophys.J. 494 (1998) L5 · the final version which matchs that published in ApJ Letters (Feb 1998); compared with the previous versions, the predictions for the SCDM model are slightly changed; Latex, 11 pages, including 3 ps figures
arxiv created 1998/01/14 · openalex publication_date 1998/02/10 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We perform a detailed analysis of the statistical significance of a concentration of Lyman break galaxies at z ~3 recently discovered by Steidel et al., using a series of N -body simulations with N =256 3 particles in a (100 h -1 Mpc) 3 comoving box. While the observed number density of Lyman break galaxies at z ~3 implies that they correspond to systems with dark matter halos of ≲10 12 M ☉ , the resulting clustering of such objects on average is not strong enough to be reconciled with the concentration if it is fairly common; we predict one similar concentration approximately per 6-10 fields in three representative cold dark matter models. Considering the current observational uncertainty of the frequency of such clustering at z ~3, it would be premature to rule out the models, but the future spectroscopic surveys in a dozen fields could definitely challenge all the existing cosmological models a posteriori fitted to the z =0 universe.