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• W2964153638 abstract "The aim of this study is to distinguish genuine cosmic voids, found in a galaxy catalog by the void finder ZOBOV–VIDE, from under-dense regions in a Poisson distribution of objects. For this purpose, we perform two multivariate analyses using the following physical void characteristics: volume, redshift, density contrast, minimum density, contrast significance and number of member galaxies of the void. The multivariate analyses are trained on a catalog of voids obtained from a random Poisson distribution of points, used as background, and a catalog of voids identified in a mock galaxy catalog, used as signal. The classifications are then applied to voids extracted from the Data Release 12 sample of Luminous Red Galaxies in the redshift range 0.45 ≤ z ≤ 0.7 from the Sloan Digital Sky Survey Baryon Oscillation Spectroscopic Survey (SDSS BOSS DR12 CMASS). Our results show that the resulting void catalog is nearly free of contamination by Poisson noise. We also study the effect of tracer sparsity and bias on the classification efficiencies." @default.
• W2964153638 created "2019-07-30" @default.
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• W2964153638 date "2019-04-01" @default.
• W2964153638 modified "2023-10-06" @default.
• W2964153638 title "Multivariate analysis of cosmic void characteristics" @default.
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• W2964153638 doi "https://doi.org/10.1016/j.ascom.2019.03.001" @default.
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