2020/07/31 by Ioannis Dalianis, Konstantinos Kritos
Earth and Planetary Sciences · Physics and Astronomy · #Amplitude #Anisotropy #Astronomy #Astrophysics #Binary black hole #Classical mechanics #Cosmic microwave background #Cosmology and Gravitation Theories #Curvature #Geophysics and Gravity Measurements #Gravitation #Gravitational wave #Gravitational wave background #Inflation (cosmology) #Perturbation (astronomy) #Physics #Primordial black hole #Pulsars and Gravitational Waves Research #Quantum electrodynamics #Quantum mechanics #Spectral density #Theoretical physics #astro-ph.CO #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.103.023505
published as Phys. Rev. D 103, 023505 (2021) · 18 pages, 8 figures, 2 appendices. Journal Version
openalex publication_date 2021/01/04 · arxiv created 2021/01/06 · arxiv updated 2021/01/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
There is a growing expectation that the gravitational wave detectors will start probing the stochastic gravitational wave backgrounds in the following years. We explore the spectral shapes of gravitational waves induced to second order by scalar perturbations and presumably have been produced in the early Universe. We calculate the gravitational wave spectra generated during radiation and kination eras together with the associated primordial black hole counterpart. We employ power spectra for the primordial curvature perturbation generated by \ensuremathα-attractors and nonminimal derivative coupling inflation models as well as Gaussian and delta-type shapes. We demonstrate the ability of the tensor modes to constrain the spectrum of the primordial curvature perturbations and discriminate among inflationary models. Gravitational wave production during kination and radiation eras can also be distinguished by their spectral shapes and amplitudes.