| | |
| | |
Stat |
Members: 3667 Articles: 2'599'751 Articles rated: 2609
08 February 2025 |
|
| | | |
|
Article overview
| |
|
Baryon effects on void statistics in the EAGLE simulation | Enrique Paillas
; Claudia D.P. Lagos
; Nelson Padilla
; Patricia Tissera
; John Helly
; Matthieu Schaller
; | Date: |
1 Sep 2016 | Abstract: | Cosmic voids are promising tools for cosmological tests due to their
sensitivity to dark energy, modified gravity and alternative cosmological
scenarios. Most previous studies in the literature of void properties use
cosmological N-body simulations of dark matter (DM) particles that ignore the
potential effect of baryonic physics. We analyse voids in the mass and subhalo
density field in the EAGLE simulations, which follow the evolution of galaxies
in a Lambda cold dark matter Universe with state-of-the-art subgrid models for
baryonic processes. We study the effect of baryons on void statistics by
comparing results with simulations that only follow the evolution of DM, but
use the same initial conditions as EAGLE. When using the mass in the
simulation, we find that a DM-only simulation produces 24 per cent more voids
than a hydrodynamical one, but this difference comes mainly from voids with
radii smaller than 5 Mpc. We do not find significant differences in the density
profiles between voids in EAGLE and its DM-only counterpart. However, voids
traced by galaxies selected by a stellar mass cut have different properties
than voids traced by a sample of subhaloes with the same number density in a
DM-only simulation. We conclude that the effects of modified gravity theories
on void properties are well captured in DM-only simulations, with baryons
having minimal effects. However, it is important to account for how galaxies
populate DM haloes to estimate the observational effect of different modified
gravity theories on the statistics of voids. | Source: | arXiv, 1609.0101 | Services: | Forum | Review | PDF | Favorites |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
|
| |
|
|
|