Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some First Steps Towards a Radiation GRMHD Code: Radiative Effects on
  Accretion Rate onto a Kerr Black Hole   The role of radiation in general relativistic magnetohydrodynamic (GRMHD)
accretion simulations is discussed through axisymmetric simulations of the
evolution of an initial torus seeded with a weak magnetic field. The paper
compares and contrasts the rate of accretion onto a Kerr black hole and mass
flux out out of the initial torus at large radii in the GRMHD code of De
Villiers and Hawley and a newly developed radiative GRMHD code. This rGRMHD
code currently operates in the diffusion approximation, restricting the study
of radiative effects to the bound portion of the accretion disk/jet system.
However, these preliminary findings suggest that radiative effects do play a
potentially significant role in regulating the accretion flow.

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The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat