Details
| Originalsprache | Englisch |
|---|---|
| Aufsatznummer | 001 |
| Fachzeitschrift | JCAP |
| Jahrgang | 2021 |
| Ausgabenummer | 6 |
| Publikationsstatus | Veröffentlicht - 1 Juni 2021 |
| Extern publiziert | Ja |
Abstract
We investigate in detail the spectrum of gravitational waves induced by a peaked primordial curvature power spectrum generated in single-field inflationary models. We argue that the f NL parameter can be inferred by measuring the high frequency spectral tilt of the induced gravitational waves. We also show that the intrinsically non-Gaussian impact of f NL in ΩGW is to broaden its peak, although at a negligible level in order not to overproduce primordial black holes. We discuss possible degeneracies in the high frequency spectral tilt between f NL and a general equation of state of the universe w. Finally, we discuss the constraints on the amplitude, peak and slope (or equivalently, f NL) of the primordial power spectrum by combining current and future gravitational wave experiments with limits on μ distortions from the cosmic microwave background.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Astronomie und Astrophysik
Zitieren
- Standard
- Harvard
- Apa
- Vancouver
- BibTex
- RIS
in: JCAP, Jahrgang 2021, Nr. 6, 001, 01.06.2021.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Probing non-Gaussianities with the high frequency tail of induced gravitational waves
AU - Atal, Vicente
AU - Domènech, Guillem
N1 - Publisher Copyright: © 2021 IOP Publishing Ltd and Sissa Medialab.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - We investigate in detail the spectrum of gravitational waves induced by a peaked primordial curvature power spectrum generated in single-field inflationary models. We argue that the f NL parameter can be inferred by measuring the high frequency spectral tilt of the induced gravitational waves. We also show that the intrinsically non-Gaussian impact of f NL in ΩGW is to broaden its peak, although at a negligible level in order not to overproduce primordial black holes. We discuss possible degeneracies in the high frequency spectral tilt between f NL and a general equation of state of the universe w. Finally, we discuss the constraints on the amplitude, peak and slope (or equivalently, f NL) of the primordial power spectrum by combining current and future gravitational wave experiments with limits on μ distortions from the cosmic microwave background.
AB - We investigate in detail the spectrum of gravitational waves induced by a peaked primordial curvature power spectrum generated in single-field inflationary models. We argue that the f NL parameter can be inferred by measuring the high frequency spectral tilt of the induced gravitational waves. We also show that the intrinsically non-Gaussian impact of f NL in ΩGW is to broaden its peak, although at a negligible level in order not to overproduce primordial black holes. We discuss possible degeneracies in the high frequency spectral tilt between f NL and a general equation of state of the universe w. Finally, we discuss the constraints on the amplitude, peak and slope (or equivalently, f NL) of the primordial power spectrum by combining current and future gravitational wave experiments with limits on μ distortions from the cosmic microwave background.
KW - inflation
KW - physics of the early universe
KW - primordial black holes
KW - primordial gravitational waves (theory)
UR - http://www.scopus.com/inward/record.url?scp=85108436333&partnerID=8YFLogxK
U2 - 10.1088/1475-7516/2021/06/001
DO - 10.1088/1475-7516/2021/06/001
M3 - Article
VL - 2021
JO - JCAP
JF - JCAP
IS - 6
M1 - 001
ER -