Las Campanas Redshift Survey中星系群
摘要
已采用“同伴-同伴” percolation 算法，从Las Campanas Redshift Survey (LCRS) 的六个切片中提取出密度增强 (groups) 的目录。该完整目录包含1495个群，涵盖LCRS星系样本的35%。通过剔除距离切片边缘太近、跨越时间超过哈勃时间、校正后速度离心为零或更小，或包含55 arcsec“孤儿”(因其距离另一星系在55 arcsec内而被排除在原始LCRS目录之外的星系)的群组，导出了394个群组的统计抽样。从统计抽样中推导出的中间属性包括：径向速度离心 sigma_los = 164 km/s，跨越时间 t_cr = 0.10/H_0，调和半径 R_h = 0.58/h Mpc，两两分离 R_p = 0.64/h Mpc，virial质量 M_vir = (1.90x10^13)/h M_sun，总群R带亮度 L_tot = (1.40x10^11)/h^2 L_sun，以及R带质量-亮度比 M/L = 153h M_sun/L_sun。
引用
@article{arxiv.astro-ph/9711176,
title = {Groups of Galaxies in the Las Campanas Redshift Survey},
author = {D. L. Tucker and Y. Hashimoto and R. P. Kirshner and S. D. Landy and H. Lin and A. Oemler and P. L. Schechter and S. A. Shectman},
journal= {arXiv preprint arXiv:astro-ph/9711176},
year = {2007}
}
备注
11 pages, LaTeX. A poster paper which appeared at the the 12th Potsdam Cosmology Workshop, "Large Scale Structure: Tracks and Traces". A 2-page writeup of the poster will appear in the conference proceedings and is presently available at http://manaslu.astro.utoronto.ca:80/~lin/ConfProc/ConfProc.html and at http://www.aip.de:8080/~tucker/ConfProc/ConfProc.html