Volume 373, Number 1, July I 2001
|Page(s)||211 - 221|
|Section||Interstellar and circumstellar matter|
|Published online||15 July 2001|
Accretion physics of AM Herculis binaries
I. Results from one-dimensional stationary radiation hydrodynamics
Universitäts-Sternwarte, Geismarlandstr. 11, 37083 Göttingen, Germany
Corresponding author: K. Beuermann, firstname.lastname@example.org
Accepted: 23 April 2001
We have solved the one-dimensional stationary two-fluid hydrodynamic equations for post-shock flows on accreting magnetic white dwarfs simultaneous with the fully frequency and angle-dependent radiative transfer for cyclotron radiation and bremsstrahlung. Magnetic field strengths to 100 MG are considered. At given B, this theory relates the properties of the emission region to a single physical parameter, the mass flow density (or accretion rate per unit area) . We present the normalized temperature profiles and fit formulae for the peak electron temperature, the geometrical shock height, and the column density of the post-shock flow. The results apply to pillbox-shaped emission regions. With a first-order temperature correction they can also be used for narrower columns provided they are not too tall.
Key words: stars: cataclysmic variables / stars: white dwarfs / stars: binaries: close / radiative transfer / hydrodynamics
© ESO, 2001
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