Document detail
ID
oai:arXiv.org:2501.16908
Topic
Astrophysics - Cosmology and Nonga... High Energy Physics - Phenomenolog...Author
Hu, Rui Chu, Ming-chung Yeung, Shek Zhang, WangzhengCategory
sciences: astrophysics
Year
2025
listing date
2/5/2025
Keywords
velocity halo neutrinos sterileAbstract
Sterile neutrinos with masses on the $\mathrm{eV}$ scale are promising candidates to account for the origin of neutrino mass and the reactor neutrino anomalies.
The mixing between sterile and active neutrinos in the early universe could result in a large abundance of relic sterile neutrinos, which depends on not only their physical mass $m_{\rm phy}$ but also their degree of thermalization, characterized by the extra effective number of relativistic degrees of freedom $\Delta N_{\rm eff}$.
Using neutrino-involved N-body simulations, we investigate the effects of sterile neutrinos on the matter power spectrum, halo pairwise velocity, and halo mass and velocity functions.
We find that the presence of sterile neutrinos suppress the matter power spectrum and halo mass and velocity functions, but enhance the halo pairwise velocity.
We also provide fitting formulae to quantify these effects.
;Comment: 22 pages, 9 main + 2 appendix figures.
Second update only corrects the abstract on arXiv page
Hu, Rui,Chu, Ming-chung,Yeung, Shek,Zhang, Wangzheng, 2025, Impact of light sterile neutrinos on cosmological large scale structure
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