Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pc-scale study of Radio galaxies & BL Lacs   We study two aspects of the differences between Active Galactic Nuclei (AGN)
of the two Fanaroff-Riley types in order to investigate the causes of the F-R
divide. We (a) contrast the properties of the optical cores in beamed and
unbeamed AGN of the two types, incorporating Hubble Space Telescope
measurements of the unbeamed objects, and (b) contrast the nuclear magnetic
field geometry of the beamed AGN of the two types using Very Long Baseline
Polarimetry.

13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph