A Simulation of Galaxy Formation and Clustering
A Simulation of Galaxy Formation and Clustering
复制标题
星系形成和星团的模拟
DOI：
--
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
G. Efstathiou
中科院分区：
文献类型：
--
作者：
F. Pearce;A. Jenkins;C. Frenk;J. Colberg;S. D. M. White;P. Thomas;H. Couchman;J. Peacock;G. Efstathiou
我们讨论了早期的结果，从第一个N-体/流体动力学模拟解决星系的形成在一个足够大的体积，他们的聚类特性被可靠地确定。该模拟遵循的星系形成的气体冷却暗晕质量的几倍1011 M以上，在一个平坦的冷暗物质宇宙与一个积极的宇宙学常数。超过2200个星系形成在我们的模拟体积（100 Mpc）3。利用光谱布居合成模型对模型星系的K波段光度函数进行了计算，结果与观测结果非常吻合。模拟中星系的两点相关函数自z = 3以来演化非常小，并且在振幅上具有接近4个数量级的幂律形状。目前，模拟中的星系关联函数在小尺度上相对于质量是反偏的，而在大尺度上是无偏的。它提供了一个合理的匹配观察。
We discuss early results from the first N-body/hydrodynamical simulation to resolve the formation of galaxies in a volume large enough for their clustering properties to be reliably determined. The simulation follows the formation of galaxies by gas cooling within dark halos of mass a few times 1011 M☉ and above, in a flat cold dark matter universe with a positive cosmological constant. Over 2200 galaxies form in our simulated volume of (100 Mpc)3. Assigning luminosities to the model galaxies using a spectral population synthesis model results in a K-band luminosity function in excellent agreement with observations. The two-point correlation function of galaxies in the simulation evolves very little since z = 3, and it has a shape close to a power law over 4 orders of magnitude in amplitude. At the present day, the galaxy correlation function in the simulation is antibiased relative to the mass on small scales and unbiased on large scales. It provides a reasonable match to observations.