arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1708.02302astro-ph.CO
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来自宇宙学模拟的大尺度环境I:重子宇宙网

The large-scale environment from cosmological simulations I: The baryonic cosmic web

Weiguang Cui, Alexander Knebe, Gustavo Yepes, Xiaohu Yang, Stefano Borgani, Xi Kang, Chris Power, Lister Staveley-Smith

摘要:

使用一系列的宇宙学模拟,其中包括一个暗物质(DM-唯一)运行,一个气体冷却恒星形成超新星反馈(CSF)运行和一个,另外包括活动星系核(AGN)的反馈,我们分类的大尺度结构与速度剪切张量代码(Vweb)和潮汐张量代码(Pweb)。我们发现重子过程对大尺度结构几乎没有影响--至少在使用上述技术分类时没有。更重要的是,我们的结果证实,单独的气体成分可以用来推断宇宙的结构几乎没有偏见,这可以应用于宇宙学约束。此外,气体细丝的速度(Vweb)和密度(Pweb)场,这可以在理论上连接到无线电观测,如HI调查分类。这将有助于我们在大尺度上无偏地将射电观测与DM分布联系起来。

英文摘要:

Using a series of cosmological simulations that includes one dark-matter-only (DM-only) run, one gas cooling-star formation-supernovae feedback (CSF) run and one that additionally includes feedback from active galactic nuclei (AGNs), we classify the large-scale structures with both a velocity-shear-tensor code (Vweb) and a tidal-tensor code (Pweb). We find that the baryonic processes have almost no impact on large-scale structures -- at least not when classified using aforementioned techniques. More importantly, our results confirm that the gas component alone can be used to infer the filamentary structure of the Universe practically un-biased, which could be applied to cosmology constrains. In addition, the gas filaments are classified with its velocity (Vweb) and density (Pweb) fields, which can theoretically connect to the radio observations, such as HI surveys. This will help us to bias-freely link the radio observations with DM distributions at large scale.

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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