Halo based reconstruction of the cosmic mass density field

Abstract

We present the implementation of a halo based method for the reconstruction of the cosmic mass density field. The method employs the mass density distribution of dark matter haloes and its environments computed from cosmological N-body simulations and convolves it with a halo catalog to reconstruct the dark matter density field determined by the distribution of haloes. We applied the method to the group catalog of Yang etal (2007) built from the SDSS Data Release 4. As result we obtain reconstructions of the cosmic mass density field that are independent on any explicit assumption of bias. We describe in detail the implementation of the method, present a detailed characterization of the reconstructed density field (mean mass density distribution, correlation function and counts in cells) and the results of the classification of large scale environments (filaments, voids, peaks and sheets) in our reconstruction. Applications of the method include morphological studies of the galaxy population on large scales and the realization of constrained simulations.

Accepted for publication in MNRAS

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• The Initial Conditions of the Universe from Constrained Simulations
• Reconstructing the Cosmic Velocity and Tidal Fields with Galaxy Groups Selected from the Sloan Digital Sky Survey
• Cosmic web alignments with the shape, angular momentum and peculiar velocities of dark matter haloes
• The cosmic web of the Local Universe: cosmic variance, matter content and its relation to galaxy morphology
• Dark Matter in the Local Universe
• Identifying galaxy groups at high redshift from incomplete spectroscopic data: I. The group finder and application to zCOSMOS
• The Local Group in the cosmic web
• ELUCID -- Exploring the Local Universe with the reConstructed Initial Density field. II: Reconstruction diagnostics, applied to numerical halo catalogs
• The four cosmic tidal web elements from the $\beta$-skeleton
• Accurate relativistic observables from post-processing light cone catalogues
• Tensor anisotropy as a tracer of cosmic voids