Effect of Massive Neutrino on Large Scale Structures

TL;DR

This paper investigates how massive neutrinos influence large-scale structures, revealing significant shifts in Jeans mass calculations and structure scales, with implications for cosmological models.

Contribution

It introduces a new analysis of Jeans mass variation with neutrino parameters, highlighting a shift in peak values and structure scales compared to previous studies.

Findings

Peak Jeans mass shifts from x=0.5 to 5.5 with parameter changes

Using harmonic mean square velocity reduces peak Jeans mass to x~2

Comparison of neutrino structure scales including virialized moments

Abstract

Jeans mass calculated with different combination of parameters involved has shown interesting variation with remarkable shifting of position of peak value from x = m/T = 0.5 to 5.5. The standard deviation is 2.217. In particular, using the harmonic mean square velocity, shifts the peak Jeans mass to x = m/T ~ 2, which is remarkably less than previously reported value of 4.2. Different scales of neutrino structures including virialized moments have also been compared.