Testing the Detection Significance on the Large-scale Structure by a JWST Deep Field Survey

被引：3

作者：

Zhang, Hao ^{[1
,2
]}

Eisenstein, Daniel J. ^{[1
]}

Garrison, Lehman H. ^{[1
]}

Ferrer, Douglas W. ^{[1
]}

机构：

[1] Harvard Univ, Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[2] Peking Univ, Sch Phys, Beijing 100871, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 875卷 / 02期

基金：

美国国家科学基金会;

关键词：

cosmology: theory; galaxies: high-redshift; galaxies: statistics; large-scale structure of universe; LY-ALPHA NEBULAE; GALAXIES; GOODS;

D O I：

10.3847/1538-4357/ab1268

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In preparation for deep extragalactic imaging with the James Webb Space Telescope, we explore the clustering of massive halos at z = 8 and 10 using a large N-body simulation. We find that halos with masses of 10(9) -10(11) h(-1) M-circle dot, which are those expected to host galaxies detectable with JWST, are highly clustered with bias factors ranging from 5 to 30 depending strongly on mass, as well as on redshift and scale. This results in correlation lengths of 5-10 h(-1) Mpc, similar to those of today's galaxies. Our results are based on a simulation of 130 billion particles in a box of size 250 h(-1) Mpc using our new high-accuracy ABACUS simulation code, the corrections to cosmological initial conditions of Garrison et al., and the Planck 2015 cosmology. We use variations between subvolumes to estimate the detectability of the clustering. Because of the very strong interhalo clustering, we find that a medium-sized survey with a transverse size of the order of 25 h(-1) comoving Mpc (about 13') may be able to detect the clustering of z = 8-10 galaxies with only 500-1000 survey objects if the galaxies indeed occupy the most massive dark matter halos.

引用

页数：8

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