微中子凝聚对宇宙结构的影响
Differential Neutrino Condensation onto Cosmic Structure
摘要：
天体物理学技术是发现中微子质量特性的先驱。目前的宇宙学观测给出了中微子质量的上限，试图使用精确的理论模型从所有物质的总和中解开小中微子的贡献。我们在天奴N体模拟中发现了微分中微子凝聚效应。中微子质量可以通过比较宇宙中不同中微子相对丰度（即当地中微子与冷暗物质密度比）区域的星系性质来推断。在“中微子丰富”的区域，与“中微子贫乏”的区域相比，更多的中微子可以被大量的晕捕获。这种效应差异倾斜晕质量函数，并开辟了独立的中微子质量测量在当前或未来的星系调查的道路。
英文摘要：
Astrophysical techniques have pioneered the discovery of neutrino mass properties. Current cosmological observations give an upper bound on neutrino masses by attempting to disentangle the small neutrino contribution from the sum of all matter using precise theoretical models. We discover the differential neutrino condensation effect in our TianNu N-body simulation. Neutrino masses can be inferred using this effect by comparing galaxy properties in regions of the universe with different neutrino relative abundance (i.e. the local neutrino to cold dark matter density ratio). In "neutrino-rich"' regions, more neutrinos can be captured by massive halos compared to "neutrino-poor" regions. This effect differentially skews the halo mass function and opens up the path to independent neutrino mass measurements in current or future galaxy surveys.
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