Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multicolour Optical Imaging of IR-Warm Seyfert Galaxies. IV. Surface
  Photometry: Colour Distributions   This paper is the fourth in a series, studying the optical properties of a
sample of mid-IR Warm Seyfert galaxies and of a control sample of mid-IR cold
galaxies. The present paper is devoted to the analysis of the colour
distributions characterizing the host galaxies. The Warm Seyfert 1 and 2
galaxies show opposite colour gradients and their colour profiles are depicting
age and dust effects within single-burst, solar metallicity models. In
particular, we find ample evidence for the occurrence of strong star formation
in the Seyfert 2 disks: their colour and emission line 2-dimensional maps
suggest dust extinction associated with on-going star formation in spiral and
tidal features; their colour profiles show starbursts of 0.5-1 Gyr or younger,
superposed on the older underlying galaxy population. Most of these properties
are shared with the Cold galaxies, while the Warm Seyfert 1s show mostly older
stellar populations and, in only a few cases, evidence for circumnuclear star
formation.

10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an