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Differential neutrino condensation onto cosmic structure

Yu, H-R, Emberson, JD, Inman, D, Zhang, T-J, Pen, U-L, Harnois-Déraps, J, Yuan, S, Teng, H-Y, Zhu, H-M, Chen, X, Xing, Z-Z, Du, Y, Zhang, L, Lu, Y and Liao, X (2017) Differential neutrino condensation onto cosmic structure. Nature Astronomy, 1 (7). ISSN 2397-3366

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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.

Item Type: Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Astrophysics Research Institute
Publisher: Nature Publishing Group
Date Deposited: 23 Jul 2020 11:16
Last Modified: 04 Sep 2021 06:57
DOI or ID number: 10.1038/s41550-017-0143
URI: https://researchonline.ljmu.ac.uk/id/eprint/13353
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