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@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 = "26 nov. 2020"
}


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