Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Millimetre/submillimetre-wave emission line searches for high-redshift
  galaxies   The redshifted spectral line radiation emitted from both atomic
fine-structure and molecular rotational transitions in the interstellar medium
(ISM) of high-redshift galaxies can be detected in the centimetre, millimetre
and submillimetre wavebands. Here we predict the counts of galaxies detectable
in an array of molecular and atomic lines. This calculation requires a
reasonable knowledge of both the surface density of these galaxies on the sky,
and the physical conditions in their ISM. The surface density is constrained
using the results of submillimetre-wave continuum surveys. Follow-up OVRO
Millimeter Array observations of two of the galaxies detected in the dust
continuum have provided direct measurements of CO rotational line emission at
redshifts of 2.56 and 2.81. Based on these direct high-redshift observations
and on models of the ISM that are constrained by observations of low-redshift
ultraluminous infrared galaxies, we predict the surface density of
line-emitting galaxies as a function of line flux density and observing
frequency. We incorporate the sensitivities and mapping speeds of existing and
future millimetre/submillimetre-wave telescopes and spectrographs, and so
assess the prospects for blank-field surveys to detect this line emission from
gas-rich high-redshift galaxies.

30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph