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Transformationally decoupling clustering and tracer bias

Published online by Cambridge University Press:  01 July 2015

Mark C. Neyrinck
Mark C. Neyrinck*
Affiliation:
Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD 21211 email: neyrinck@pha.jhu.edu
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Abstract

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Gaussianizing transformations are used statistically in many non-cosmological fields, but in cosmology, we are only starting to apply them. Here I explain a strategy of analyzing the 1-point function (PDF) of a spatial field, together with the ‘essential’ clustering statistics of the Gaussianized field, which are invariant to a local transformation. In cosmology, if the tracer sampling is sufficient, this achieves two important goals. First, it can greatly multiply the Fisher information, which is negligible on nonlinear scales in the usual δ statistics. Second, it decouples clustering statistics from a local bias description for tracers such as galaxies.

Keywords

large-scale structure of universecosmology: theorymethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S306: Statistical Challenges in 21st Century Cosmology , May 2014 , pp. 251 - 254
Copyright
Copyright © International Astronomical Union 2015 

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