Imprints of primordial non-Gaussianity on gravitational wave spectrum

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F19%3A00519706" target="_blank" >RIV/68378271:_____/19:00519706 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1103/physrevd.99.041301" target="_blank" >https://doi.org/10.1103/physrevd.99.041301</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevD.99.041301" target="_blank" >10.1103/PhysRevD.99.041301</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Imprints of primordial non-Gaussianity on gravitational wave spectrum

Popis výsledku v původním jazyce

Although cosmic microwave background and large scale structure probe the largest scales of our Universe with ever-increasing precision, our knowledge about the smaller scales is still very limited other than the bounds on primordial black holes (PBHs). We show that the statistical properties of the small scale quantum fluctuations can be probed via the stochastic gravitational wave (GW) background, which is induced as the scalar modes reenter the horizon. We found that even if scalar curvature fluctuations have a subdominant non-Gaussian component, these non-Gaussian perturbations can source a dominant portion of the induced GWs. Moreover, the GWs sourced by non-Gaussian scalar fluctuations peak at a higher frequency and this can result in distinctive observational signatures.

Název v anglickém jazyce

Imprints of primordial non-Gaussianity on gravitational wave spectrum

Popis výsledku anglicky

Although cosmic microwave background and large scale structure probe the largest scales of our Universe with ever-increasing precision, our knowledge about the smaller scales is still very limited other than the bounds on primordial black holes (PBHs). We show that the statistical properties of the small scale quantum fluctuations can be probed via the stochastic gravitational wave (GW) background, which is induced as the scalar modes reenter the horizon. We found that even if scalar curvature fluctuations have a subdominant non-Gaussian component, these non-Gaussian perturbations can source a dominant portion of the induced GWs. Moreover, the GWs sourced by non-Gaussian scalar fluctuations peak at a higher frequency and this can result in distinctive observational signatures.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

<a href="/cs/project/EF15_003%2F0000437" target="_blank" >EF15_003/0000437: Kosmologie, gravitace a temný sektor vesmíru</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

—

Svazek periodika

99

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

000458139000001

EID výsledku v databázi Scopus

2-s2.0-85062345436