arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1706.09899astro-ph.GA
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星系形成的EAGLE模拟:粒子数据的公开发布

The EAGLE simulations of galaxy formation: Public release of particle data

The EAGLE team

摘要:

这本手册伴随着室女座财团的星系形成的宇宙学流体动力学模拟的EAGLE套件的24个模拟的粒子数据的发布。它描述了如何下载这些快照以及如何从中提取数据集,强调变量的含义及其单位。我们提供了在python中提取粒子数据的示例。这个数据发布补充了我们早期通过SQL关系数据库发布的EAGLE中星系的许多综合属性。该数据库已更新,以包括作为当前数据发布的一部分的其他模拟。想要使用EAGLE的科学家可能会发现,在访问粒子数据之前,首先调查他们的分析是否可以使用数据库进行是有用的。快照文件中的粒子由peano-hilbert键索引。这允许轻松提取简单连接的空间体积,而无需读取整个快照。这使得使用适度的计算资源来分析星系的许多方面成为可能,即使在使用大量粒子的EAGLE模拟时。提供了一个读取例程来简化此过程。

英文摘要:

This manual accompanies the release of the particle data for 24 simulations of the EAGLE suite of cosmological hydrodynamical simulations of galaxy formation by the virgo consortium. It describes how to download these snapshots and how to extract datasets from them, emphasising the meaning of variables, and their units. We provide examples for extracting the particle data in python. This data release complements our earlier release of numerous integrated properties of the galaxies in EAGLE through an SQL relational database. This database has been updated to include the additional simulations that are part of the present data release. Scientists wanting to use EAGLE may find it useful to first investigate whether their analysis can be performed using the database, before accessing the particle data. The particles in the snapshot files are indexed by a peano-hilbert key. This allows for an eased extraction of simply connected spatial volumes, without needing to read the entire snapshot. This makes it possible to analyse many aspects of galaxies using modest computing resources, even when using EAGLE simulations with large numbers of particles. A reading routine is provided to simplify this process.

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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