New Probes of Large Scale Structure

2020/07/01 by Peikai Li, Rupert A. C. Croft, Li, Peikai +3 · 1 citation
Physics and Astronomy · #Astronomy and Astrophysical Research #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph.CO #astro-ph.GA

paper · pdf · doi:10.48550/arxiv.2007.00226

8 pages, 3 figures

arxiv created 2021/06/01 · arxiv updated 2021/06/03

Abstract

This is the second paper in a series where we propose a method of indirectly measuring large scale structure using information from small scale perturbations. The idea is to build a quadratic estimator from small scale modes that provides a map of structure on large scales. We demonstrated in the first paper that the quadratic estimator works well on a dark-matter-only N-body simulation at a snapshot of z=0. Here we generalize the theory to the case of a light cone halo catalog with a non-cubic region taken into consideration. We successfully apply the generalized version of the quadratic estimator to the light cone halo catalog based on an N-body simulation of volume ∼15.03 (h^-1 \rm Gpc)³. The most distant point in the light cone is at a redshift of 1.42, indicating the applicability of our method to next generation of galaxy surveys.

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