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- W4225852912 abstract "The spatial distribution of galaxies at sufficiently small scales will encode information about the identity of the dark matter. We develop a novel description of the halo distribution using persistent homology summaries, in which collections of points are decomposed into clusters, loops, and voids. We apply these methods, together with a set of hypothesis tests, to dark matter haloes in Milky Way-analog environment regions of the cold dark matter (CDM) and warm dark matter (WDM) Copernicus Complexio $N$-body cosmological simulations. The results of the hypothesis tests find statistically significant differences (p-values $ensuremath{le}0.001$) between the CDM and WDM structures, and the functional summaries of persistence diagrams detect differences at scales that are distinct from the comparison spatial point process functional summaries considered (including the two-point correlation function). The differences between the models are driven most strongly at filtration scales $ensuremath{sim}100text{ }text{ }mathrm{kpc}$, where CDM generates larger numbers of unconnected halo clusters while WDM instead generates loops. This study was conducted on dark matter haloes generally; future work will involve applying the same methods to realistic galaxy catalogues." @default.
- W4225852912 created "2022-05-05" @default.
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- W4225852912 date "2022-07-22" @default.
- W4225852912 modified "2023-10-17" @default.
- W4225852912 title "Differentiating small-scale subhalo distributions in CDM and WDM models using persistent homology" @default.
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- W4225852912 doi "https://doi.org/10.1103/physrevd.106.023521" @default.
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