The Halo Void (Dust) Model of Large Scale Structure

Abstract

Within the Halo Model of large scale structure, all matter is contained in dark matter halos. This simple yet powerful framework has been broadly applied to multiple data sets and enriched our comprehension of how matter is distributed in the Universe. In this work we extend this assumption by allowing for matter to rest not only inside halos but also within cosmic voids and in between halos and voids (which we call 'dust'). This assumption leads to additional contributions (1Void, 2Void, Halo-Void, etc.) to the predictions of correlation functions, spectra and profiles for both halos and voids. Whereas the Halo Model can only make predictions for halo quantities, the Halo Void Model extends those for void statistics and halo-void cross-correlations. We provide recipes for all new ingredients of the Halo Void (Dust) Model, such as the void abundance, linear bias and density profile and test their validity in a N-body simulation. Including voids and dust into the calculations improves the transition between the 1Halo and the 2Halo terms by up to $\sim 6\%$. It also eliminates the need to include low-mass structures on the normalization of large-scale terms, suggesting that halos and voids are complementary cosmic structures to effectively describe matter distribution on large scales of the Universe.

40 pages, 12 figures. Comments are welcome. v2: Published in JCAP

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Cited by in corpus (18)

• HMcode-2020: Improved modelling of non-linear cosmological power spectra with baryonic feedback
• Precision cosmology with voids in the final BOSS data
• Euclid: Forecasts from redshift-space distortions and the Alcock-Paczynski test with cosmic voids
• Cosmological constraints from the BOSS DR12 void size function
• Including beyond-linear halo bias in halo models
• Euclid: Forecasts from the void-lensing cross-correlation
• Responses of Halo Occupation Distributions: a new ingredient in the halo model & the impact on galaxy bias
• The halo bias inside cosmic voids
• The Effective Field Theory of Large-Scale Structure and Multi-tracer
• On the Merger Rate of Primordial Black Holes in Cosmic Voids
• Cosmological Constraints from Weak Lensing Peaks: Can Halo Models Accurately Predict Peak Counts?
• The BAHAMAS project: Evaluating the accuracy of the halo model in predicting the non-linear matter power spectrum
• Got plenty of nothing: cosmic voids as a probe of particle dark matter
• Unveiling the Universe with Emerging Cosmological Probes
• Weak-lensing tunnel voids in simulated light cones: A new pipeline to investigate modified gravity and massive neutrinos signatures
• The galaxy bias profile of cosmic voids
• Voids and Halos in Voids statistics as a probe of the Expansion History of the Universe
• Web-Halo Model (WHM): Accurate non-linear matter power spectrum predictions without free parameters