# Gravitational Waves Induced by non-Gaussian Scalar Perturbations

24 May 2019 Cai Rong-gen Pi Shi Sasaki Misao

We study gravitational waves (GWs) induced by non-Gaussian curvature perturbations. We calculate the density parameter per logarithmic frequency interval, $\Omega_\text{GW}(k)$, given that the power spectrum of the curvature perturbation $\mathcal{P}_\mathcal{R}(k)$ has a narrow peak at some small scale $k_*$, with a local-type non-Gaussianity, and constrain the nonlinear parameter $f_\text{NL}$ with the future LISA sensitivity curve as well as with constraints from the abundance of the primordial black holes (PBHs)... (read more)

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• COSMOLOGY AND NONGALACTIC ASTROPHYSICS
• GENERAL RELATIVITY AND QUANTUM COSMOLOGY
• HIGH ENERGY PHYSICS - PHENOMENOLOGY
• HIGH ENERGY PHYSICS - THEORY