Tracing the filamentary structure of the galaxy distribution at z ∼ 0.8

被引:24
作者
Choi, Ena [1 ]
Bond, Nicholas A. [2 ]
Strauss, Michael A. [1 ]
Coil, Alison L. [5 ]
Davis, Marc [3 ]
Willmer, Christopher N. A. [4 ]
机构
[1] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA
[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA
[3] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA
[4] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA
[5] Univ Calif San Diego, Dept Phys, CASS, San Diego, CA 92093 USA
基金
美国国家科学基金会; 美国国家航空航天局;
关键词
galaxies: formation; galaxies: high-redshift; large-scale structure of Universe; DIGITAL SKY SURVEY; LYMAN-BREAK GALAXIES; VLT DEEP SURVEY; REDSHIFT SURVEY; LUMINOSITY FUNCTION; COSMIC WEB; DATA RELEASE; EVOLUTION; SKELETON; UNIVERSE;
D O I
10.1111/j.1365-2966.2010.16707.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We study filamentary structure in the galaxy distribution at z similar to 0.8 using data from the Deep Extragalactic Evolutionary Probe 2 (DEEP2) Redshift Survey and its evolution to z similar to 0.1 using data from the Sloan Digital Sky Survey (SDSS). We trace individual filaments for both surveys using the Smoothed Hessian Major Axis Filament Finder, an algorithm which employs the Hessian matrix of the galaxy density field to trace the filamentary structures in the distribution of galaxies. We extract 33 subsamples from the SDSS data with a geometry similar to that of DEEP2. We find that the filament length distribution has not significantly changed since z similar to 0.8, as predicted in a previous study using a Lambda cold dark matter cosmological N-body simulation. However, the filament width distribution, which is sensitive to the non-linear growth of structure, broadens and shifts to smaller widths for smoothing length-scales of 5-10 h-1 Mpc from z similar to 0.8 to 0.1, in accord with N-body simulations.
引用
收藏
页码:320 / 328
页数:9
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