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Universal structure of dark matter haloes over a mass range of 20 orders of magnitude

机译：普遍结构的暗物质卤化在20个级别的质量范围内

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摘要

Cosmological models in which dark matter consists of cold elementary particles predict that the dark halo population should extend to masses many orders of magnitude below those at which galaxies can form(1-3). Here we report a cosmological simulation of the formation of present-day haloes over the full range of observed halo masses (20 orders of magnitude) when dark matter is assumed to be in the form of weakly interacting massive particles of mass approximately 100 gigaelectronvolts. The simulation has a full dynamic range of 30 orders of magnitude in mass and resolves the internal structure of hundreds of Earth-mass haloes in as much detail as it does for hundreds of rich galaxy clusters. We find that halo density profiles are universal over the entire mass range and are well described by simple two-parameter fitting formulae(4,5). Halo mass and concentration are tightly related in a way that depends on cosmology and on the nature of the dark matter. For a fixed mass, the concentration is independent of the local environment for haloes less massive than those of typical galaxies. Haloes over the mass range of 10(-3)to 10(11)solar masses contribute about equally (per logarithmic interval) to the luminosity produced by dark matter annihilation, which we find to be smaller than all previous estimates by factors ranging up to one thousand(3).Simulations of formation of dark matter haloes ranging in size from Earth mass to clusters of galaxies find a universal halo density structure spanning 20 orders of magnitude in mass.
机译：宇宙学模型，其中暗物质由冷基本颗粒组成，预测暗光环群应延伸到肿块以下几个数量级，下层可以形成星系（1-3）。在这里，我们在暗物质被假定为弱相互作用的质量颗粒的质量弱相互作用的颗粒的形式时，我们报告了当前一系列晕圈（20个峰值级）形成的宇宙学模拟。仿真在质量上具有30个数量级的全动态范围，并尽可能详细地解决了数百个地球质量卤化物的内部结构，因为它为数百种富含的星系集群。我们发现光环密度型材在整个质量范围内是通用的，并且通过简单的双参数配合公式（4,5）很好地描述。晕群质量和浓度紧紧地以取决于宇宙学和暗物质的性质。对于固定的质量，浓度与局部环境无关，对于比典型的星系更少的卤素。在10（-3）到10（11）到10（11）个太阳能群体的质量范围内的卤化物与暗物湮灭产生的发光度有关（对数间隔）的贡献，我们发现比以前的所有估计量小于所有因素一千（3）。从地球质量到星系簇的大小形成暗物质卤素的模拟，发现跨越20个质量级的万能晕孔密度结构。

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  • 来源
    《Nature》 |2020年第7823期|39-42|共4页
  • 作者

    Wang J.; Bose S.; Frenk C. S.; Gao L.; Jenkins A.; Springel V.; White S. D. M.;

  • 作者单位

    Chinese Acad Sci Key Lab Computat Astrophys Natl Astron Observ Beijing Peoples R China|Univ Chinese Acad Sci Sch Astron & Space Sci Beijing Peoples R China;

    Ctr Astrophys Harvard & Smithsonian Cambridge MA USA;

    Univ Durham Inst Computat Cosmol Dept Phys Durham England;

    Chinese Acad Sci Key Lab Computat Astrophys Natl Astron Observ Beijing Peoples R China|Univ Chinese Acad Sci Sch Astron & Space Sci Beijing Peoples R China;

    Univ Durham Inst Computat Cosmol Dept Phys Durham England;

    Max Planck Inst Astrophys Garching Germany;

    Max Planck Inst Astrophys Garching Germany;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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