Non-Gaussianity test for discriminating gravitational wave backgrounds around 0.1-1Hz

Abstract

We propose a non-Gaussianity test for gravitational wave backgrounds by combining data streams of multiple detectors. This simple method allows us to check whether a detected background is "smooth" enough to be consistent with an inflation-type background, or is contaminated by individually undetectable weak burst signals. The proposed test would be quite useful for the Big Bang Observer or DECIGO whose primary target is a background from inflation at 0.1-1Hz where gravitational wave bursts from supernovae of population III stars might become a troublesome foreground.

5 pages, to appear in ApJL

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• Detection methods for stochastic gravitational-wave backgrounds: a unified treatment
• Probing the Universe through the Stochastic Gravitational Wave Background
• Characterizing the Cosmological Gravitational Wave Background Anisotropies and non-Gaussianity
• Cosmological test of gravity with polarizations of stochastic gravitational waves around 0.1-1 Hz
• Forecast constraints on cosmic string parameters from gravitational wave direct detection experiments
• Gravitational wave backgrounds and the cosmic transition from Population III to Population II stars
• Measuring the non-Gaussian stochastic gravitational-wave background: a method for realistic interferometer data
• 3-pt Statistics of Cosmological Stochastic Gravitational Waves
• Non-Gaussianity analysis of GW background made by short-duration burst signals
• Tracking the origin of black holes with the stochastic gravitational wave background popcorn signal
• Probing a stationary non-Gaussian background of stochastic gravitational waves with pulsar timing arrays
• Gravitational Waves from Q-ball Formation
• Stochastic backgrounds of gravitational waves from extragalactic sources
• Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays
• Deep learning for intermittent gravitational wave signals
• Improved detection statistics for non Gaussian gravitational wave stochastic backgrounds