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Astrophysics > Astrophysics of Galaxies

arXiv:2411.11443 (astro-ph)
[Submitted on 18 Nov 2024]

Title:Halo Spin Depends on The Distance to Large-scale Filament

Authors:Wenxiao Xue, Yu Rong, Zichen Hua
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Abstract:We employ a semi-analytical methodology to estimate the dark matter halo spin of HI gas-rich galaxies in the Arecibo Legacy Fast Alfa Survey and investigate the relationship between halo spin and the proximity of galaxies to large-scale filaments. We exclude galaxies with low HI signal-to-noise ratios, those potentially influenced by velocity dispersions, and those affiliated with galaxy clusters/groups. Additionally, we apply a mass-weighting technique to ensure consistent mass distribution across galaxy samples at varying distances from filaments. Our analysis reveals, for the first time, a subtle yet statistically significant correlation between halo spin and filament distance in observational data, indicating higher spins closer to filaments. This suggests that the tidal forces exerted by filaments may impact the spin of dark matter halos.
Comments: Submitted
Subjects: Astrophysics of Galaxies (astro-ph.GA)
Cite as: arXiv:2411.11443 [astro-ph.GA]
  (or arXiv:2411.11443v1 [astro-ph.GA] for this version)
  https://doi.org/10.48550/arXiv.2411.11443

Submission history

From: Yu Rong [view email]
[v1] Mon, 18 Nov 2024 10:18:42 UTC (92 KB)
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