Toward accurate measurement of property-dependent galaxy clustering: II. Tests of the smoothed density-corrected $V_{\max }$ method

Abstract

We present a smoothed density-corrected $V_{\max }$ technique for building a random catalog for property-dependent galaxy clustering estimation. This approach is essentially based on the density-corrected $V_{\max }$ method of Cole(2011), with three improvements to the original method. To validate the improved method, we generate two sets of flux-limited samples from two independent mock catalogs with different $k+e$ corrections. By comparing the two-point correlation functions, our results demonstrate that the random catalog created by the smoothed density-corrected $V_{\max }$ approach provides a more accurate and precise measurement for both sets of mock samples than the commonly used $V_{\max }$ method and redshift shuffled method. For flux-limited samples and color-dependent subsamples, the accuracy for the projected correlation function is well constrained within $1\%$ on the scale $0.07h^{-1}\mathrm{Mpc}-30{\mathrm{h}}^{-1}\mathrm{Mpc}$. The accuracy of the redshift-space correlation function is less than $2\%$ as well. Currently, it is the only approach that holds promise for achieving the goal of high-accuracy clustering measures for next-generation surveys.

arXiv comment18 pages, 12 figures, corrected typos, published version. Comments welcome!

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