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arXiv 0912.3525astro-ph.CO
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局域宇宙的精确约束模拟

Precision constrained simulation of the Local Universe

Guilhem Lavaux

摘要:

我们使用约束高斯随机场的形式来计算我们的本地宇宙的60 Mpc/h的体积的精确的大尺度模拟。我们从2 MASS红移巡天重建的奇特速度导出了这些约束。我们得到的暗物质分布的对数密度场的模拟和本地宇宙的观测星系的对数密度之间的相关性为0.97。我们实现了一个很好的比较,从星系距离的NBG-3 k的观测速度场的模拟速度场。最后,我们比较了2 MRS星系和模拟的暗物质粒子的两点关联函数。我们的结论是,这种方法是一种非常有前途的技术,探索我们附近的宇宙的动力学和特殊性。

英文摘要:

We use the formalism of constrained Gaussian random field to compute a precise large scale simulation of the 60 Mpc/h volume of our Local Universe. We derive the constraints from the reconstructed peculiar velocities of the 2MASS Redshift Survey. We obtain a correlation of 0.97 between the log-density field of the dark matter distribution of the simulation and the log-density of observed galaxies of the Local Universe. We achieve a good comparison of the simulated velocity field to the observed velocity field obtained from the galaxy distances of the NBG-3k. At the end, we compare the two-point correlation function of both the 2MRS galaxies and of the dark matter particles of the simulation. We conclude that this method is a very promising technique of exploring the dynamics and the particularities the Universe in our neighbourhood.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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