Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lenticular galaxies at the outskirts of the Leo II group: NGC 3599 and
  NGC 3626   We have studied unbarred S0 galaxies, NGC 3599 and NGC 3626, the members of
the X-ray bright group Leo II, by means of 3D spectroscopy, long-slit
spectroscopy, and imaging, with the aim to identify epoch and mechanismsof
their transformation from spirals. Both galaxies have appeared to bear a
complex of features resulting obviously from minor merging: decoupled gas
kinematics, nuclear starforming rings, and multi-tiered oval large-scale
stellar disks. The weak-emission line nucleus of NGC 3599 bears all signs of
the Seyfert activity, according to the line-ratio diagnostics of the gas
excitation mechanism. After all, we conclude that the transformation of these
lenticular galaxies has had place about 1-2 Gyr ago, through the gravitational
mechanisms not related to hot intragroup medium of Leo II.

11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
2
The categories of this paper are: math