Gravitational Waves Induced by Scalar Perturbations with a Broken Power-law Peak
General Relativity and Quantum Cosmology
2025-04-30 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
We give an analytical approximation for the energy spectrum of the scalar-induced gravitational waves (SIGWs) generated by a broken power-law power spectrum, and find that both the asymptotic power-law tails and the intermediate peak contribute distinct features to the SIGW spectrum. Moreover, the broken power-law power spectrum has abundant near-peak features and our results can be used as a near-peak approximation that covers a wide range of models. Our analytical approximation is useful in the rapid generation of the SIGW energy spectrum, which is beneficial for gravitational wave data analysis.
Keywords
Cite
@article{arxiv.2407.12914,
title = {Gravitational Waves Induced by Scalar Perturbations with a Broken Power-law Peak},
author = {Chong-Zhi Li and Chen Yuan and Qing-guo Huang},
journal= {arXiv preprint arXiv:2407.12914},
year = {2025}
}
Comments
25 pages, 6 figures, final version (JCAP)