On the Correlation between Spin Parameter and Halo Mass

TL;DR

This paper investigates the relationship between halo mass and spin parameter in early universe dark matter halos, revealing a mass-dependent correlation that diminishes at later formation times, impacting galaxy formation theories.

Contribution

It identifies a novel correlation between halo mass and spin parameter at high redshifts, extending understanding of dark matter halo properties during early cosmic epochs.

Findings

Spin parameter decreases with increasing halo mass at z > 10

Correlation weakens for halos forming at later times

Implications for galaxy formation at high redshifts

Abstract

We report on a correlation between virial mass M and spin parameter lambda for dark matter halos forming at redshifts z > 10. We find that the spin parameter decreases with increasing halo mass. Interestingly, our analysis indicates that halos forming at later times do not exhibit such a strong correlation, in agreement with the findings of previous studies. We briefly discuss the implications of this correlation for galaxy formation at high redshifts and the galaxy population we observe today.