Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecular gas structure around an AGN with nuclear starburst: 3-D
  Non-LTE calculations of CO lines   We have performed three-dimensional, non-LTE radiative transfer calculations
for 12CO and 13CO lines, applying them to our high-resolution hydrodynamic
models of the `torus' around a SMBH in an active galactic nucleus. The
hydrodynamic simulations reveal inhomogeneous and turbulent gas structure on a
sub-pc scale in a circum-nuclear starburst region. Thick disks interlaced with
filaments, clumps and holes are naturally formed due to the interplay among
energy feedback from supernovae, self-gravity of the gas, galactic rotation,
and radiative cooling. The intensity maps of the molecular lines for the
circum-nuclear disks show a clumpy structure reflecting the intrinsic
inhomogeneity and turbulent motion of the gas disk. The fine structure of the
`torus' could be resolved in the nearby active galaxies using ALMA. We also
found that the X-factor is not uniformly distributed in the central 100 pc
region. The X-factor derived for 12CO(J=1-0) intensity depends strongly on the
intensity, whereas the X for 12CO(3-2) is nearly constant over two orders of
magnitude of the intensity. The suggested conversion factor for the molecular
gas mass is X_CO (3-2) ~ 0.27 x 10^{20} cm^{-2} (K km s^{-1})^{-1}.

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The categories of this paper are: nlin
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
3
The categories of this paper are: physics
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph