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Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays

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arxiv 1812.10615 v3 pith:BMB4YTJE submitted 2018-12-27 gr-qc astro-ph.COhep-phhep-th

Searching for Bispectrum of Stochastic Gravitational Waves with Pulsar Timing Arrays

classification gr-qc astro-ph.COhep-phhep-th
keywords bispectrumgravitationalstochasticwavesarraysbispectraprobepulsar
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study how to probe bispectra of stochastic gravitational waves with pulsar timing arrays. The bispectrum is a key to probe the origin of stochastic gravitational waves. In particular, the shape of the bispectrum carries valuable information of inflation models. We show that an appropriate filter function for three point correlations enables us to extract a specific configuration of momentum triangles in bispectra. We also calculate the overlap reduction functions and discuss strategy for detecting the bispectrum with multiple pulsars.

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Cited by 2 Pith papers

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