@Article{CarvalhoACLMMRRR:2022:BeGrRa,
               author = "Carvalho, G. A. and Anjos, R. C. dos and Coelho, Jaziel Goulart 
                         and Lobato, R. V. and Malheiro, M. and Marinho, R. M. and 
                         Rodriguez, J. F. and Rueda, J. A. and Ruffini, R.",
          affiliation = "{Universidade Tecnol{\'o}gica Federal do Paran{\'a} (UTFPR)} and 
                         {Universidade Federal do Paran{\'a} (UFPR)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidad de los 
                         Andes} and {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} 
                         and {Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and 
                         {Universidad Industrial de Santander} and ICRANet and ICRANet",
                title = "Orbital Decay of Double White Dwarfs: Beyond Gravitational-wave 
                         Radiation Effects",
              journal = "Astrophysical Journal",
                 year = "2022",
               volume = "940",
               number = "1",
                pages = "e90",
                month = "Nov.",
             abstract = "The traditional description of the orbital evolution of 
                         compact-object binaries, like double white dwarfs (DWDs), assumes 
                         that the system is driven only by gravitational-wave (GW) 
                         radiation. However, the high magnetic fields with intensities of 
                         up to gigagausses measured in WDs alert a potential role of the 
                         electromagnetic (EM) emission in the evolution of DWDs. We 
                         evaluate the orbital dynamics of DWDs under the effects of GW 
                         radiation, tidal synchronization, and EM emission by a unipolar 
                         inductor generated by the magnetic primary and the relative motion 
                         of the nonmagnetic secondary. We show that the EM emission can 
                         affect the orbital dynamics for magnetic fields larger than 
                         megagausses. We applied the model to two known DWDs, SDSS 
                         J0651+2844 and ZTF J1539+5027, for which the GW radiation alone 
                         does not fully account for the measured orbital decay rate. We 
                         obtain upper limits to the primarys magnetic field strength, over 
                         which the EM emission causes an orbital decay faster than 
                         observed. The contribution of tidal locking and the EM emission is 
                         comparable, and together they can contribute up to 20% to the 
                         measured orbital decay rate. We show that the gravitational 
                         waveform for a DWD modeled as purely driven by GWs and including 
                         tidal interactions and EM emission can have large relative 
                         dephasing detectable in the mHz regime of frequencies relevant for 
                         space-based detectors like LISA. Therefore, including physics 
                         besides GW radiation in the waveform templates is essential to 
                         calibrate the GW detectors using known sources, e.g., ZTF 
                         J1539+5027, and to infer binary parameters.",
                  doi = "10.3847/1538-4357/ac9841",
                  url = "http://dx.doi.org/10.3847/1538-4357/ac9841",
                 issn = "0004-637X and 1538-4357",
             language = "en",
           targetfile = "Carvalho_2022_ApJ_940_90.pdf",
        urlaccessdate = "09 maio 2024"
}