Salvato in:
| Autore principale: | |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
| Accesso online: | https://arxiv.org/abs/2409.02780 |
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Sommario:
- We find an analytical solution for the minimal matter density of a void, its central density. It turns out that the voids are not so empty: most of the voids have the central underdensity $Δ_c \sim -50\%$ (which means that the matter density in their centers is only two times lower than in the Universe on average). For small voids (of radius $R_0\simeq 5-10$~{Mpc}), the underdensity can be significantly greater, but the number of voids decreases rapidly with increasing of $|Δ_c|$ over $50\%$, and voids with $Δ_c < -80\%$ are practically absent. The large voids ($R_0\ge 40$~{Mpc}) always have $|Δ_c| < 50\%$.