@Article{NunesAlveAraú:2019:PrGrWa,
author = "Nunes, Rafael da Costa and Alves, M{\'a}rcio E. S. and
Ara{\'u}jo, Jos{\'e} Carlos Neves de",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidade Estadual Paulista (UNESP)} and {Instituto Nacional
de Pesquisas Espaciais (INPE)}",
title = "Primordial gravitational waves in Horndeski gravity",
journal = "Physical Review D",
year = "2019",
volume = "99",
number = "8",
pages = "084022",
month = "Apr.",
abstract = "We investigate the propagation of primordial gravitational waves
within the context of the Homdeski theories; for this, we present
a generalized transfer function quantifying the subhorizon
evolution of gravitational wave modes after they enter the
horizon. We compare the theoretical prediction of the modified
primordial gravitational wave spectral density with the aLIGO,
Einstein telescope, LISA, gLISA and DECIGO sensitivity curves.
Assuming reasonable and different values for the free parameters
of the theory (in agreement with the event GW170817 and stability
conditions of the theory), we note that the gravitational wave
amplitude can vary significantly in comparison with general
relativity. We find that in some cases the gravitational
primordial spectrum can cross the sensitivity curves for the
DECIGO detector with the maximum frequency sensitivity to the
theoretical predictions around 0.05-0.30 Hz. From our results, it
is clear that the future generations of space based
interferometers can bring new perspectives to probing
modifications in general relativity.",
doi = "10.1103/PhysRevD.99.084022",
url = "http://dx.doi.org/10.1103/PhysRevD.99.084022",
issn = "1550-2368 and 1550-7998",
language = "en",
targetfile = "nunes_primordial.pdf",
urlaccessdate = "27 abr. 2024"
}