author = "Alves, M. E. S. and Moraes, P. H. R. S. and Ara{\'u}jo, Jos{\'e} 
                         Carlos Neves de and Malheiro, M.",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Tecnol{\'o}gico de Aeron{\'a}utica (ITA)}",
                title = "Gravitational waves in f (R;T) and f (R;T\ϕ) theories of 
              journal = "Physical Review D",
                 year = "2016",
               volume = "94",
                pages = "024032",
                month = "July",
             abstract = "There is a host of alternative theories of gravitation in the 
                         literature, among them the f(R, T) and f(R, T-phi) theories 
                         recently elaborated by Harko et al. In these theories, R, T and 
                         T-phi are respectively the Ricci scalar and the traces of the 
                         energy-momentum tensors of matter and of a scalar field. There is 
                         already in the literature a series of studies of different forms 
                         of the f(R, T) and f(R, T-phi) functions as well as their 
                         cosmological consequences. However, there have been no studies so 
                         far related to gravitational waves. Here we consider such an 
                         issue, in particular, studying the putative extra polarization 
                         modes that can appear in the scope of such theories. Different 
                         functional forms of f(R, T-phi) are considered and the 
                         gravitational waveforms are found for the extra polarization modes 
                         in the cases in which they are present.",
                  doi = "10.1103/PhysRevD.94.024032",
                  url = "http://dx.doi.org/10.1103/PhysRevD.94.024032",
                 issn = "1550-2368 and 1550-7998",
             language = "en",
        urlaccessdate = "29 nov. 2020"