@Article{BelloniRSCCHLLMOPSSSZ:2021:BrDeMa,
               author = "Belloni, Diogo Teixeira and Rodrigues, Claudia Vilega and 
                         Schreiber, Matthias R. and Castro Avila, Manuel Antonio and Costa, 
                         Joaquim Eduardo Rezende and Hayashi, Takayuki and Lima, Isabel de 
                         Jesus and Luna, Gerardo J. M. and Martins, Murilo and Oliveira, 
                         Alexandre S. and Parsons, Steven G. and Silva, Karleyne M. G. and 
                         Stecchini, Paulo Eduardo Freire and Stuchi, Teresa J. and 
                         Zorotovic, Monica",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Universidad 
                         T{\'e}cnica Federico Santa Mar{\'{\i}}a} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de 
                         Pesquisas Espaciais (INPE)} and {NASA Goddard Space Flight Center} 
                         and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Universidad de Buenos Aires} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {Universidade do Vale do 
                         Para{\'{\i}}ba (UNIVAP)} and {University of Sheffield} and 
                         {Gemini Observatory} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)} and {Universidade Federal do Rio de Janeiro 
                         (UFRJ)} and {Universidad de Valpara{\'{\i}}so}",
                title = "Breaking the Degeneracy in Magnetic Cataclysmic Variable X-Ray 
                         Spectral Modeling Using X-Ray Light Curves",
              journal = "Astrophysical Journal Supplement Series",
                 year = "2021",
               volume = "256",
               number = "2",
                month = "OCT",
             abstract = "We present an analysis of mock X-ray spectra and light curves of 
                         magnetic cataclysmic variables using an upgraded version of the 3D 
                         cyclops code. This 3D representation of the accretion flow allows 
                         us to properly model total and partial occultation of the 
                         postshock region by the white dwarf as well as the modulation of 
                         the X-ray light curves due to the phase-dependent extinction of 
                         the preshock region. We carried out detailed postshock region 
                         modeling in a four-dimensional parameter space by varying the 
                         white dwarf mass and magnetic field strength as well as the 
                         magnetosphere radius and the specific accretion rate. To calculate 
                         the postshock region temperature and density profiles, we assumed 
                         equipartition between ions and electrons; took into account the 
                         white dwarf gravitational potential, the finite size of the 
                         magnetosphere, and a dipole-like magnetic field geometry; and 
                         considered cooling by both bremsstrahlung and cyclotron radiative 
                         processes. By investigating the impact of the parameters on the 
                         resulting X-ray continuum spectra, we show that there is an 
                         inevitable degeneracy in the four-dimensional parameter space 
                         investigated here, which compromises X-ray continuum spectral 
                         fitting strategies and can lead to incorrect parameter estimates. 
                         However, the inclusion of X-ray light curves in different energy 
                         ranges can break this degeneracy, and it therefore remains, in 
                         principle, possible to use X-ray data to derive fundamental 
                         parameters of magnetic cataclysmic variables, which represents an 
                         essential step toward understanding their formation and 
                         evolution.",
                  doi = "10.3847/1538-4365/ac141c",
                  url = "http://dx.doi.org/10.3847/1538-4365/ac141c",
                 issn = "0067-0049 and 1538-4365",
                label = "20211025",
             language = "en",
           targetfile = "belloni-Breaking.pdf",
        urlaccessdate = "28 abr. 2024"
}