Induced gravitational waves in a general cosmological background

By Guillem Domènech. International Journal of Modern Physics D, 2019

142 citations recorded by the source corpus.

Gravitational waves (GWs) are inevitably produced by second-order terms in cosmological perturbation theory. Most notably, the so-called induced (GWs) are a window to the small scales part of the primordial spectrum of fluctuations and a key counterpart to the primordial black hole (PBH) scenario. However, semi-analytical solutions are only known for matter and radiation domination eras. In this paper, we present new analytic integral formulas for the induced GWs on subhorizon scales in a general cosmological background with a constant equation-of-state. We also discuss applications to a peaked primordial scalar power spectrum and the PBH scenario.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/70dc9ffd9675ddece0e0712d4e0e3a842ed80ba8

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. Shi Pi
2. Misao Sasaki
3. Guillem Domènech
4. Chunshan Lin
5. K. Kohri
6. C. Byrnes
7. T. Terada
8. Kiwoon Choi

In Nuclear and High Energy Physics

1. Misao Sasaki
2. Shi Pi
3. Chunshan Lin
4. Guillem Domènech
5. C. Byrnes

Citations in the corpus

• Induced gravitational waves as a probe of thermal history of the universe (2020, methodology): “[85] for w > 0 once we rescaled the formulas of those references so that c(2)s = 1.”
• Gravitational wave constraints on the primordial black hole dominated early universe (2020, background): “Not only they are crucial PBH counterparts [35, 48–50] but constitute powerful probes of the primordial curvature power spectrum on small scales [51, 52] and the thermal history of the universe [37, 38, 53, 54].”