Sctructures of post-shock flows in mcvs: new results from modelling the hydrodynamics in a bipolar magnetic field

Details Sctructures of post-shock flows in mcvs: new results from modelling the hydrodynamics in a bipolar magnetic field Sctructures of post-shock flows in mcvs: new results from modelling the hydrodynamics in a bipolar magnetic field

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003basbr..23..228c&link_type=abstract

Boletim da Sociedade Astronômica Brasileira (ISSN 0101-3440), vol.23, no.1, p. 228-228

Astronomy and Astrophysics

Astronomy

Scientific paper

Accretion flow along a dipolar magnetic field is a common phenomenon in magnetic cataclysmic binaries systems. Previous investigation about the distribution of temperature, density, velocity and shock position in the accretion flow used geometrical approximations to solve the problem. We investigate hydrodynamics flows in accreting compact binary systems using, for the first time, a dipolar magnetic field lines as one of the curvilinear coordinates. We solved the hydrodynamic equations in curvilinear coordinates and determined the temperature and density structure of the accretion flow. The result is applied to magnetic cataclysmic variables of type Intermediary Polar. We have found that there are significant differences between the structures obtained by spherical, cylindrical and planar geometries (used in all previous studies) and the structure obtained by exact treatment of the dipolar field geometry. Our formulation will provide better models for determining the properties for radiation from magnetic cataclysmic variables, in particular concerning the mass estimation from X-ray continuum and line measurements.

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