标题： 超星系团的权重 显示英文标题

标题： Weighing Superclusters

摘要： 我们提交了一份关于科罗娜波雷阿利斯超星团的质量和动力学状态的详细研究的总结报告，这是迄今为止对该天体的最大规模红移调查。 我们在临界平坦和低密度宇宙模型中的模拟超星团上进行了广泛的$N$体实验，以测试用于数据的质量估计器的稳健性和误差。 根据超星团中528个星系的红移和动力学，科罗娜波雷阿利斯的质量被估计至少为$3\times 10^{16} h^{-1} M_\odot$，质量与光度比为$560 h (M/L)_\odot$，从而得出物质密度参数为$\Omega_m\approx 0.4$。 我们还讨论了利用引力透镜映射超星团尺度上质量分布的前景。 显示英文摘要

摘要： We present a summary report on a detailed study of the mass and dynamical state of the Corona Borealis supercluster using the largest redshift survey of this object to date. Extensive $N$-body experiments are performed on simulated superclusters in both critically-flat and low-density cosmological models to test the robustness and errors of the mass estimators used on the data. From the redshifts and dynamics of 528 galaxies in the supercluster, the mass of Corona Borealis is estimated to be at least $3\times 10^{16} h^{-1} M_\odot$, and the mass-to-light ratio is $560 h (M/L)_\odot$, yielding a matter density parameter of $\Omega_m\approx 0.4$. We also discuss the prospects for mapping the mass distribution on supercluster scales with gravitational lensing.