http://arxiv.org/abs/2205.09028
The structures in the Universe are distributed in the cosmic web. The structures’ distribution, statistics, and evolution can be considered probes of cosmological models. We investigate the number density of voids and dark matter halo-in-voids in the Excursion Set Theory (EST). We study both the spherical and ellipsoidal collapse models in the Markov and non-Markov frameworks of the EST. Then, we compare the number density of voids and halo-in-voids in standard $\Lambda$CDM and reconstructed model. The reconstructed model is a model-independent expansion history reconstruction from background observations. In this work, the effect of the collapse model barrier in exclusion of the trajectories in EST is explored. This exclusion affects the statistics of voids and the halo-in-voids. We show that the statistic of the voids in the non-Markov extension of EST is almost independent of the collapse model. Finally, we show that the number density of halo-in-voids can distinguish these two models and address the anomalies such as void phenomena.
L. Parkavousi, H. Kameli and S. Baghram
Thu, 19 May 22
44/61
Comments: 7 pages, 7 figures, 1 table. Comments are welcome!
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