Rodrigues, Claudia V.
Schreiber, Matthias R.
Costa, Joaquim E. R.
Lima, Isabel J.
Luna, Gerardo J. M.
[6, 7, 8]
Oliveira, Alexandre S.
Parsons, Steven G.
Silva, Karleyne M. G.
Stecchini, Paulo E.
Stuchi, Teresa J.
 Univ Buenos Aires, Fac Ciencias Exactas & Nat, Buenos Aires, DF - Argentina
 Univ Buenos Aires, CONICET, Inst Astron Fis Espacio IAFE, Av Inte Guiraldes 2620, C1428ZAA, Buenos Aires, DF - Argentina
 Univ Nacl Hurlingham, Av Gdor Vergara 2222, Buenos Aires, DF - Argentina
 Univ Vale Paraiba, IP&D, BR-12244000 Sao Jose Dos Campos, SP - Brazil
 Univ Sheffield, Dept Phys & Astron, Sheffield S3 7RH, S Yorkshire - England
 Gemini Observ, Casilla 603, La Serena - Chile
 European Southern Observ, Alonso Cordova 3107, Santiago 19001 - Chile
 Univ Sao Paulo, IAG, Rua Matao 1226, BR-05508900 Sao Paulo, SP - Brazil
 Univ Fed Rio Janeiro, Cidade Univ, BR-21941972 Rio De Janeiro, RJ - Brazil
 Univ Valparaiso, Inst Fsi & Astron, Av Gran Bretana 1111, Valparaiso 2360102 - Chile
Total Affiliations: 15
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES;
Web of Science Citations:
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. (AU)