Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Testing the homogeneity of bright radio sources at 15 GHz   A sample of radio-loud active galactic nuclei (AGN) at 2cm is studied to test
the isotropic distribution of radio sources in the sky and their uniform
distribution in space. The sample is complete flux-density limits of 1.5Jy for
positive declinations and 2Jy for declinations between 0 and -20 degrees. The
active galactic nuclei sample comprises of 133 members. Application of the
two-dimensional Kolmogorov-Smirnov test shows that there is no significant
deviation from the isotropic distribution in the sky, while the generalised
V/Vm test shows that the space distribution of AGN is not uniform at high
confidence level (99.9%). This is indicative of a strong positive evolution of
AGN with cosmic epoch implying that AGN (or jet activity phenomena) were more
populous at high redshifts. It is shown that the evolution depends strongly on
luminosity: low-luminosity QSOs show a strong positive evolution, while
high-luminosity counterparts do not seem to show any evolution with cosmic
epoch.

9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph