Measurement of the spatial cross-correlation function of damped Lyα systems and Lyman break galaxies

被引：33

作者：

Cooke, J

Wolfe, AM

Gawiser, E

Prochaska, JX

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif San Diego, Ctr Astrophys & Space Sci, La Jolla, CA 92093 USA

[3] Yale Univ, Dept Astron, New Haven, CT 06520 USA

[4] Univ Calif Santa Cruz, Lick Observ, Santa Cruz, CA 95064 USA

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 636卷 / 01期

基金：

美国国家科学基金会;

关键词：

galaxies : evolution; galaxies : formation; galaxies : high-redshift; quasars : absorption lines;

D O I：

10.1086/499779

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the first spectroscopic measurement of the spatial cross-correlation function between damped Ly alpha systems (DLAs) and Lyman break galaxies (LBGs). Analysis of deep u'BVRI imaging of nine QSO fields with 11 known z similar to 3 DLAs has spectroscopically confirmed 211 z > 2 LBGs to R = 25.5. We find strong evidence for an overdensity of LBGs near DLAs versus random, the results of which are similar to that of LBGs near other LBGs. A maximum likelihood cross-correlation analysis finds the best-fit value for the correlation length to be r(0) = 2.9(-1.5)(+1.4) h(-1) Mpc using a fixed value of gamma = 1.6. The implications of the DLA-LBG clustering amplitude on the average dark matter halo mass of DLAs are discussed.

引用

页码：L9 / L12

页数：4