Confronting cold dark matter cosmologies with strong clustering of Lyman break galaxies at z approximately 3 - INSPIRE

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Confronting cold dark matter cosmologies with strong clustering of Lyman break galaxies at z approximately 3

Y.P. Jing
(
- Tokyo U.
)
,
Yasushi Suto
(
- Tokyo U.
)

Oct, 1997

10 pages

Published in:

Astrophys.J.Lett. 494 (1998) L5

e-Print:

astro-ph/9710090 [astro-ph]

DOI:

10.1086/311163

Report number:

UTAP-275-97,
RESCEU-40-97

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Abstract: (arXiv)

We perform a detailed analysis of the statistical significance of a concentration of Lyman break galaxies at

z \sim 3

recently discovered by Steidel et al. (1997), using a series of N-body simulations with

N=256^3

particles in a (100\himpc)^3 comoving box. While the observed number density of Lyman break galaxies at

z\sim3

implies that they correspond to systems with dark matter halos of \simlt 10^{12}M_\odot, 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\sim 10

) fields in three representative cold dark matter models. Considering the current observational uncertainty of the frequency of such clustering at

z\sim3

, 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.

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