Gravitational Waves Induced by Non-Gaussian Scalar Perturbations
Institute of Theoretical Physics · Chinese Academy of Sciences · +4 more institutions
Abstract
We study gravitational waves (GWs) induced by non-Gaussian curvature perturbations. We calculate the density parameter per logarithmic frequency interval, ${\mathrm{\ensuremath{\Omega}}}_{\mathrm{GW}}(k)$, 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 ${f}_{\mathrm{NL}}$ with the future LISA sensitivity curve as well as with constraints from the abundance of the primordial black holes (PBHs). We find that the non-Gaussian contribution to ${\mathrm{\ensuremath{\Omega}}}_{\mathrm{GW}}$ increases as ${k}^{3}$, peaks at $k/{k}_{*}=4/\sqrt{3}$, and…
Citation impact
- FWCI
- 32.27
- Percentile
- 100%
- References
- 181
Authors
3- RCRong-Gen CaiCorresponding
Institute of Theoretical Physics, Chinese Academy of Sciences, University of Chinese Academy of Sciences
- SPShi Pi
Kavli Institute for the Physics and Mathematics of the Universe
- MSMisao Sasaki
National Taiwan University, Kyoto University, Institute of Theoretical Physics, Kavli Institute for the Physics and Mathematics of the Universe, Chinese Academy of Sciences
Topics & keywords
- Physics
- Omega
- Curvature
- Spectral density
- Primordial black hole
- Cutoff
- Scalar (mathematics)
- Gravitational wave