Yp. Jing et Y. Suto, CONFRONTING COLD DARK-MATTER COSMOLOGIES WITH STRONG CLUSTERING OF LYMAN BREAK GALAXIES AT Z-SIMILAR-TO-3, The Astrophysical journal, 494(1), 1998, pp. 5-8
We perform a detailed analysis of the statistical significance of a co
ncentration of Lyman break galaxies at z similar to 3 recently discove
red by Steidel et al., using a series of N-body simulations with N = 2
56(3) particles in a (100 (h-1) Mpc)(3) comoving box. While the observ
ed number density of Lyman break galaxies at z similar to 3 implies th
at they correspond to systems with dark matter halos of less than or s
imilar to 10(12) M-., the resulting clustering of such objects on aver
age 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. Consi
dering the current observational uncertainty of the frequency of such
clustering at z similar to 3, it would be premature to rule out the mo
dels, but the future spectroscopic surveys in a dozen fields could def
initely challenge all the existing cosmological models a posteriori fi
tted to the z = 0 universe.