Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ionisation Structure in Accretion Shocks with a Composite Cooling
  Function   We have investigated the ionisation structure of the post-shock regions of
magnetic cataclysmic variables using an analytic density and temperature
structure model in which effects due to bremsstrahlung and cyclotron cooling
are considered. We find that in the majority of the shock-heated region where
H- and He-like lines of the heavy elements are emitted, the
collisional-ionisation and corona-condition approximations are justified. We
have calculated the line emissivity and ionisation profiles for Iron as a
function of height within the post-shock flow. For low-mass white dwarfs, line
emission takes place near the shock. For high-mass white dwarfs, most of the
line emission takes place in regions well below the shock and hence it is less
sensitive to the shock temperature. Thus, the line ratios are useful to
determine the white-dwarf masses for the low-mass white dwarfs, but the method
is less reliable when the white dwarfs are massive. Line spectra can, however,
be used to map the hydrodynamic structure of the post-shock accretion flow.

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The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
19
The categories of this paper are: eess
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
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The categories of this paper are: adap-org