Differential Neutrino Condensation onto Cosmic Structure
Abstract
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.
Cite
@article{arxiv.1609.08968,
title = {Differential Neutrino Condensation onto Cosmic Structure},
author = {Hao-Ran Yu and J. D. Emberson and Derek Inman and Tong-Jie Zhang and Ue-Li Pen and Joachim Harnois-Déraps and Shuo Yuan and Huan-Yu Teng and Hong-Ming Zhu and Xuelei Chen and Zhi-Zhong Xing and Yunfei Du and Lilun Zhang and Yutong Lu and XiangKe Liao},
journal= {arXiv preprint arXiv:1609.08968},
year = {2019}
}
Comments
15 pages, 6 figures