Higher-order statistics of the stochastic gravitational wave background from supermassive black hole binaries
The episode discusses a paper introducing a method to extract physical information from higher-order statistics (variance, skewness, kurtosis) of the stochastic gravitational wave background from supermassive black hole binaries. The authors use a physically motivated redshift regularization limit to overcome statistical divergences, leading to specific predictions like a K/S2 ratio of nine/five that can test the binary origin hypothesis.