Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Molecular data and radiative transfer tools for ALMA   This paper presents an overview of several modeling tools for analyzing
molecular line observations at submillimeter wavelengths. These tools are
already proving to be very valuable for the interpretation of data from current
telescopes, and will be indispensable for data obtained with ALMA. The tools
are: (1) the Leiden Atomic and Molecular DAtabase (LAMDA), a collection of
spectroscopic data and collisional excitation rates; (2) RADEX, an on-line and
off-line program to calculate non-LTE excitation and emission from a
homogeneous medium, based on the escape probability approximation; (3) RATRAN,
an accelerated Monte Carlo program to solve molecular excitation and radiative
transfer in spherical and cylindrical symmetry. The paper presents examples of
how to use these tools in conjunction with existing data reduction packages to
quantitatively interpret submillimeter single-dish and interferometric
observations. The described tools are publically available at
http://www.strw.leidenuniv.nl/~moldata .
  The paper concludes with a discussion of future needs in the fields of
molecular data and radiative transfer.

3
The categories of this paper are: physics
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
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The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph