Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of Disk Galaxies in Phenomenological Models of Galaxy
  Formation   We present a phenomenological model for understanding the origins and
evolution of galaxy morphologies from a phenomenological perspective. The model
includes an observationally motivated prescription for star formation in galaxy
disks, as well as a merger-driven starburst mode of star formation. We consider
the formation of bulges and ellipticals both in mergers and by global
instabilities in disks. We use our model to investigate the fundamental
properties of disk galaxies and the effects of surface-brightness limits on
large galaxy surveys.

31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex