HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Warmth elevating the depths: shallower voids with warm dark matter

Abstract : Warm dark matter (WDM) has been proposed as an alternative to cold dark matter (CDM), to resolve issues such as the apparent lack of satellites around the Milky Way. Even if WDM is not the answer to observational issues, it is essential to constrain the nature of the dark matter. The effect of WDM on haloes has been extensively studied, but the small-scale initial smoothing in WDM also affects the present-day cosmic web and voids. It suppresses the cosmic `sub-web' inside voids, and the formation of both void haloes and subvoids. In N-body simulations run with different assumed WDM masses, we identify voids with the ZOBOV algorithm, and cosmic-web components with the ORIGAMI algorithm. As dark-matter warmth increases (i.e. particle mass decreases), void density minima grow shallower, while void edges change little. Also, the number of subvoids decreases. The density field in voids is particularly insensitive to baryonic physics, so if void density profiles and minima could be measured observationally, they would offer a valuable probe of the nature of dark matter. Furthermore, filaments and walls become cleaner, as the substructures in between have been smoothed out; this leads to a clear, mid-range peak in the density PDF.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03644878
Contributor : Hal Sorbonne Université Gestionnaire Connect in order to contact the contributor
Submitted on : Thursday, April 28, 2022 - 10:57:14 AM
Last modification on : Thursday, May 12, 2022 - 6:22:03 PM

Files

stv1087.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Lin F. Yang, Mark C. Neyrinck, Miguel A. Aragón-Calvo, Bridget Falck, Joseph Silk. Warmth elevating the depths: shallower voids with warm dark matter. Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P - Oxford Open Option A, 2015, 451, pp.3606-3614. ⟨10.1093/mnras/stv1087⟩. ⟨insu-03644878⟩

Share

Metrics

Record views

9

Files downloads

0