Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Vertical Structure and Ultraviolet Spectrum of X-Ray Irradiated
  Accretion Disks in Active Galactic Nuclei   Motivated by recent work indicating that the UV continuum in AGN may be
produced by reradiation of energy absorbed from X-rays irradiating an accretion
disk, we present a calculation of the vertical structures and ultraviolet
spectra of X-ray irradiated accretion disks around massive non-rotating black
holes. After finding the radial dependence of vertically-integrated quantities
for these disks, we solve the equations of hydrostatic equilibrium, energy
balance, and frequency-dependent radiation transfer as functions of altitude.
To solve the last set of equations, we use a variable Eddington factor method.
We include electron scattering, free-free, and HI, HeI, and HeII bound-free
opacities and the corresponding continuum cooling processes.
  While the overall spectral shape predicted by X-ray irradiation may be
compatible with observations, the Lyman edge emission feature it predicts is
not. This finding raises questions for many otherwise plausible models in which
X-ray irradiation plays a major role.

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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
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The categories of this paper are: stat
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The categories of this paper are: dg-ga
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: solv-int