Abstract / Description of output
We study the spherical evolution model for voids in ΛCDM, where
the evolution of voids is governed by dark energy at an earlier time
than that for the whole universe or in overdensities. We show that the
presence of dark energy suppresses the growth of peculiar velocities,
causing void shell-crossing to occur at progressively later epochs as
ΩΛ increases. We apply the spherical model to
evolve the initial conditions of N-body simulated voids and compare the
resulting final void profiles. We find that the model is successful in
tracking the evolution of voids with radii greater than 30
h-1 Mpc, implying that void profiles could be used to
constrain dark energy. We find that the initial peculiar velocities of
voids play a significant role in shaping their evolution. Excluding the
peculiar velocity in the evolution model delays the time of shell
crossing.
| Original language | English |
|---|---|
| Pages (from-to) | 512-519 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 463 |
| Issue number | 1 |
| Early online date | 12 Aug 2016 |
| DOIs | |
| Publication status | Published - 1 Nov 2016 |
Keywords / Materials (for Non-textual outputs)
- cosmology: theory
- dark energy
- large-scale structure of Universe