Galaxy Skew-Spectra in Redshift-Space
  Modern galaxy surveys focus on the galaxy power spectrum or 2-point
correlation function to test and constrain cosmological models. Additional
information comes from higher-order N-point functions, but their analysis is
challenging. A simple solution is to compute the cross-power spectrum between
the squared galaxy density and the galaxy density. Being simple to measure and
to plot, this skew-spectrum shares many of the familiar useful properties of
the standard galaxy power spectrum. We show that by computing multiple
quadratic fields and correlating them with the density, all contributions to
the tree-level redshift-space galaxy bispectrum can be captured with
skew-spectra. Using synthetic datasets, we show that our measurement pipeline
matches analytical predictions, and that their dependence on galaxy bias
parameters and the logarithmic growth rate is as expected theoretically.
